Jump to content

Gas Mileage on 5.3 V8 engine on a 4x4

Wiggums

Recommended Posts

Wiggums Senior Enthusiast

Wiggums

Posted
  • Author
Posted
9 minutes ago, aseibel said:

Ok, I get it.

"grade braking" does not use the brakes at all. It uses the engine compression and transmission resistance to slow you down. I haven't noticed it downshift to accomplish this, but I imagine it would if your speed allowed for it.

 

Turning this off just allows you to free-wheel down grades more.

 

I thought it would also use the brakes as well if it was too steep. Ah, THANKS!

  • Replies 85
  • Created
  • Last Reply
Wiggums Senior Enthusiast

Wiggums

Posted
  • Author
Posted

Also, I don't know if that would be the case, but my F-150 got much better gas mileage if I filled it up with the Mexican Pemex gasoline but it cost about $4.00 per gallon while it was only $3.30 in California. 19.50 pesos per litre.

I'd get 24 mpg instead of 20 mpg because the Mexican gas generally doesn't come with ethanol. Sometimes it is refined in California and I get ethanol. In Mexicali, it's usually refined in other areas. In Tijuana, I've noticed consistently bad gas mileage on my F-150 and I found out later on that a lot of gas there is refined in California.

b1gted Enthusiast

b1gted

Posted
Posted

All I know is my 2016 4x4 Crew Cab Silverado gets crap for gas mileage.  Just look at my signature.   But I don't care.   I work for an oil company.   :cool:

rikhek Enthusiast

rikhek

Posted
Posted

I get just under 13 mpg combined city/highway and 9.8 towing a 6x10 enclosed trailer with three 250 dirt bikes in the trailer.  FWIW, I don't care what mileage I get and I drive it as such.  Gasoline is so damn inexpensive these days I surprised anybody that can afford an expensive vehicle gives a damn.  Then again, I'm VERY proud of my VERY large carbon footprint.  Bigger the better!!!

f8l vnm Senior Enthusiast

f8l vnm

Posted
Posted

My 2016 Denali 4x4 standard bed is around 17. Highway and street mixed. Not terrible but no way in hell I can get over 20 if I don’t do 60 on a super flat freeway. Honestly could care less about gas. 

the wanderer Enthusiast

the wanderer

Posted
Posted
5 hours ago, Wiggums said:

 

Here, it's really steep downhill and limit drops from 45 to 35 and there is almost always a motorcycle cop. I still don't want it to brake, i want to control it myself.

I just want it to prefer downshifting rather than braking while it's slowing down. If it won't downshift then I'll do it. I want to maximize the brake life.

 

Dude. Brake pads are like 50 bucks a wheel and last > 100,000 KM, at least on my Jeep they did. You've spent more time and energy posting on how to maximize your brake life, than you saved attempting to hypermile your way down a hill. Not to mention probably pissing off the guys driving behind you.

 

Life is to short to worry about saving 30 bucks on some brake pads. You need to let go a little, smell the roses, have a coffee, enjoy your new wheels.

Smitty Enthusiast

Smitty

Posted
Posted
18 hours ago, Cpl_Punishment said:

If I remember correctly, Mythbusters got the best fuel economy with a piece of plastic "netting" in place of the tailgate because you lose the weight of the tailgate but you maintain the aerodynamic benefits of having it there. 

I have to imagine that no little wing on the back of the cab and the lip on the tailgate are helping with that now.   The tailgate it also aluminum so it can't count for much.  

Smitty Enthusiast

Smitty

Posted
Posted
6 hours ago, Wiggums said:

Also, I don't know if that would be the case, but my F-150 got much better gas mileage if I filled it up with the Mexican Pemex gasoline but it cost about $4.00 per gallon while it was only $3.30 in California. 19.50 pesos per litre.

I'd get 24 mpg instead of 20 mpg because the Mexican gas generally doesn't come with ethanol. Sometimes it is refined in California and I get ethanol. In Mexicali, it's usually refined in other areas. In Tijuana, I've noticed consistently bad gas mileage on my F-150 and I found out later on that a lot of gas there is refined in California.

I'd never buy gas in Mexico again.   hahaha.. it's been years but the last time I did from a station it ate through the carburetor gaskets!   I don't think they have the same regulations there at all.   Not to get sidetracked but they have bad water and bad gas I'm guessing!   hahaha

Smitty Enthusiast

Smitty

Posted
Posted
3 hours ago, rikhek said:

I get just under 13 mpg combined city/highway and 9.8 towing a 6x10 enclosed trailer with three 250 dirt bikes in the trailer.  FWIW, I don't care what mileage I get and I drive it as such.  Gasoline is so damn inexpensive these days I surprised anybody that can afford an expensive vehicle gives a damn.  Then again, I'm VERY proud of my VERY large carbon footprint.  Bigger the better!!!

I agree!   I think the interest is more in the improvements made technology wise and if we are paying a ton of money for a truck that was half the price not too long ago we better get something noticeable!   hahaha

I every day commute in a 4 cylinder, I didn't buy a 6.2 for gas savings! 

Wiggums Senior Enthusiast

Wiggums

Posted
  • Author
Posted
3 hours ago, rikhek said:

... towing a 6x10 enclosed trailer with three 250 dirt bikes in...

 For a moment, I thought you had 250 dirt bikes in there and I typed a response then read it again... deleted it and replaced it with this.

Wiggums Senior Enthusiast

Wiggums

Posted
  • Author
Posted
35 minutes ago, Smitty said:

I'd never buy gas in Mexico again.   hahaha.. it's been years but the last time I did from a station it ate through the carburetor gaskets!   I don't think they have the same regulations there at all.   Not to get sidetracked but they have bad water and bad gas I'm guessing!   hahaha

Goodness, things are different nowadays. Never had problems on my Benz and Audi (both bought new in Mexico but similar to U.S. models), it's come a very long way since then, my friend. Come on down and visit a Pemex. I've been getting better gas mileage from Pemex compared to any of the gas in the U.S. - in fact, Pemex is no longer the only player in the field, we now have BP, Arco, Agil, Shell, etc.

rikhek Enthusiast

rikhek

Posted
Posted
6 minutes ago, Wiggums said:

 For a moment, I thought you had 250 dirt bikes in there and I typed a response then read it again... deleted it and replaced it with this.

LOL.  Yeah, it would have helped if I included the pound symbol (i.e., 250# dirt bikes).  Also doesn't help mileage towing at 83 mph.  Speed limit is 75 mph so I set it at 7 over and forget about it.  What I found interesting is I get about 1 mpg less than my 2010 Tahoe with the 5.3 towing the EXACT same trailer the EXACT same 160 mile round trip trek to the motocross track and back at 83 mph.  I'm surprised the mileage is less.

Smitty Enthusiast

Smitty

Posted
Posted
9 minutes ago, Wiggums said:

Goodness, things are different nowadays. Never had problems on my Benz and Audi (both bought new in Mexico but similar to U.S. models), it's come a very long way since then, my friend. Come on down and visit a Pemex. I've been getting better gas mileage from Pemex compared to any of the gas in the U.S. - in fact, Pemex is no longer the only player in the field, we now have BP, Arco, Agil, Shell, etc.

That's good to know!  hahaha..   I was a young kid at the time and horrified!   Hey I learned a lot about carb rebuild kits because of it!  hahaha.  I"m guessing that was straight alcohol at the time. .hahaha

 

Cpl_Punishment Senior Enthusiast

Cpl_Punishment

Posted
Posted
5 hours ago, Smitty said:

I have to imagine that no little wing on the back of the cab and the lip on the tailgate are helping with that now.   The tailgate it also aluminum so it can't count for much.  

True. Things have undoubtedly changed since they did that test 15 years ago. 

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • KARNUT
      OCI, not when but why?

      By KARNUT · Posted

      As a matter of amusement I’ll leave this conversation with this. Do you beat the government average fuel estimate? Statistics are a guide to me. Not a rule. Someone once said I have to have the last word. If true and possible may be. I’ll blame that on working in a family business.
    • bluev8
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By bluev8 · Posted

      That is a fair point, and I agree that trying to log “everything in the truck” would be the wrong direction.   There are a lot of modules and a lot of traffic. If the product became a full-truck datalogger, the amount of data would get huge very quickly, and most owners would never use it.   I think the first useful version would need to be narrow: - powertrain-side event evidence - selected high-value parameters - communication / voltage / reset events - pre/post event window - short report first, raw log only as backup   One distinction I should make is between active OBD/PID polling and passive bus capture. If you are polling PIDs through OBD, then yes: the more parameters you request, the lower the effective sample rate becomes, and you are adding diagnostic traffic to a vehicle that is already busy running itself. With passive CAN capture, the recorder is not asking all the modules for data. It is listening to traffic that is already on the bus. So it does not consume vehicle bus bandwidth in the same way that a scan tool polling hundreds of PIDs would. But your point still applies in a different way.   Even if passive capture does not add bus traffic, the recorder still has limits: - processing rate - storage rate - timestamp accuracy - decoder workload - event filtering - report size - user attention span   So the answer cannot be “log everything and let the user figure it out.” The product would need to store enough raw evidence to be useful, but only decode, graph, and present the important parts around the event.   A practical report should probably show: - what triggered the capture - how much pre/post data was preserved - which selected parameters changed - how those values compared to baseline - whether the same pattern happened before - whether any voltage, reset, bus-off, lost-message, or communication fault occurred - selected graphs around the event - raw data only as supporting evidence   So I agree with you. More data is not automatically better. The real product is the reduction from raw data into a useful event report.
    • bluev8
      Intermittent no-code issues on 2022.5+ V8 trucks — what did the shop fail to capture?

      By bluev8 · Posted

      That makes sense, and I agree with most of that.   I think the product would need both: 1. a default powertrain template, so it is useful out of the box; 2. user-selected priority parameters, so the owner or shop can choose what they want to see first.   Different users are going to care about different things. One owner may care about oil pressure and voltage. Another may care about misfire trend, AFM/DFM behavior, or U-codes. A shop may want communication events and repeatability first. Your baseline point is probably the most important one. Raw data is not very useful unless the report can show what normal looked like for that vehicle under similar conditions.   The way I would think about it is: - start with a basic known-good baseline - learn normal behavior for that specific vehicle over time - allow the event to be overlaid against baseline - show whether the event was a one-time spike or a repeatable pattern - provide a simple severity level, but with clear limits on what that severity means   For example, early severity could be something like: - Info: event captured, no obvious abnormal pattern - Watch: value moved outside baseline, but not repeated - Warning: repeatable abnormal pattern under similar conditions - Critical: communication loss, voltage drop, bus-off, reset, or severe repeated event   I would not want the first version to say “replace this part.” That would be overclaiming unless there is repair-confirmed data behind it. It would be more honest to say “this pattern deserves inspection.”   On the OBD port question, I think OBD absolutely has a role. OBD is probably the right place for: - DTCs - freeze frame - VIN - calibration information - normal scan-tool parameters - Mode 6 / enhanced diagnostic data if available The reason I am still looking at an ECM-side recorder is that the failure may happen before anyone connects a scan tool. If the owner plugs in a scanner after the event, the pre-event evidence may already be gone unless the ECU happened to save it. So I do not see this as “OBD versus ECM-side.” I see it more like: - ECM-side recorder: always armed, rolling buffer, event evidence - OBD/DLC companion: DTCs, freeze frame, VIN, calibration, normal scan data - phone/cloud: status, notes, upload, report generation, notifications   I agree that phone connection and push notifications would be useful. I just would not want the phone or cloud connection to be required for capture. The recorder should save the event locally even if the phone is not connected. The phone should help with event marking, download, notes, upload, alerts, and report viewing.   For a default GM V8 event report, would this list make sense? - RPM - calculated load / MAP - throttle position - vehicle speed - gear / torque converter state if available - coolant temperature - oil pressure - oil temperature if available - battery voltage - commanded AFM/DFM state if available - actual AFM/DFM state if available - misfire counters / roughness by cylinder if available - fuel trims - relevant U-codes / communication events - bus-off / lost periodic message / module reset / voltage drop events Which of those would you remove, and what would you add?
    • Grumpy Bear
      OCI, not when but why?

      By Grumpy Bear · Posted

      I went to the county a few years back to dispute my property taxes. To do that I hired an appraiser and a lawyer. The County Assessor wished to argue that the homes in my neighborhood the appraiser used were all 'distressed properties" and not representative of the "Market Average".    My response was," Of the 50 homes in our subdivision 43 of them were "distressed properties" under bank foreclosure and as such "Distressed IS the market". Lawyer about choked on his coffee and handed the Assessor the 'receipts'.    I won that case on the evidence provided by the Lawyer and the Appraiser.    We have the same thing going on here. My statements were based on the GOVERNMENTS NATIONAL DATA and yours on local markets in areas of your interest. They are both correct....   Thing is, this divergence was based on NATIONAL and not on LOCAL. I think you even understand that. But like you said, we are both stubborn and hardheaded.    I do not see any advantage to disengagement.  But that said we can step back to compose ourselves. 
    • revmanii
      Looking at ordering a '26 WT because I want a std cab, std bed

      By revmanii · Posted

      Trust me I appreciate the comments and concerns. It's what I was looking for to help me evaluate the situation and what I want to do. I have decided to move forward with the BORA hubcentric slip on 3/8" (.375") with the extended lugs nuts. Fedex says they should be here Monday :). Meanwhile, the dealer got the remote start and Patriot spray in bed liner done over the last couple of days. Also, I installed an inline stop/start eliminator today. Starts back up in what whatever mode you shut it off in, so you don't have to hit the button every time you fire up.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...