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C & A s Dad

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C & A s Dad Senior Enthusiast

C & A s Dad

Posted
Posted

I took the advise of Snoman and I believe Steady Eddie had also agreed, and began running premium fuel (93) in my Wife's Yukon XL 5.3L with 4.10s. I have towed once with it and although I cannot prove it, it did seem to tug my 6500 lb camper better especailly in the hills. I will tow with it again this weekend and see if I can tell a dif for sure.

 

However, my MPG has changed for sure. I had an average of 6 or 7 fill ups prior to using premium and I was averaging 18.17 MPG. I have filled up twice (not counting towing miles) since using the 93 and the first fill up got me 20.23 the second was 19.77. The first tank was almost all Interstate at less than 75 MPH and the second was non interstate at 60 to 65 with some city and several stops within the city. (My Wife's shopping stops). This is an average of 20MPG.

 

I realize this is not enough info to go the bank with yet, but it does seem true that the 93 will help MPG.

 

I also work with a guy who is Certified Ford Trainer, an ASE Master Tech, although he is no longer turning wrenches, and I discussed using 93 oct ,the spark advance, powere increase, MPG increase idea with him. He agreed with the entire theory, if you want to call it that. He has heard this before and completely agreed with it. Pretty smart guy even if he is a Ford Man.

 

Just to cut down on any questions: My wife drives like an old lady, I refueled the truck myself on all fueling mentioned above and can promise I filled it as equal on every fueling as possible. I run the tires at 37 PSI cold. The only mod to the truck is a TrueFlow CAI set up. I run only Chevron fuel with 3 ozs of Lucas Upper Cyl lube per 10 gal of fuel. I will report more as I check more tanks.

Norseman Senior Enthusiast

Norseman

Posted
Posted
I took the advise of Snoman and I believe Steady Eddie had also agreed, and began running premium fuel (93) in my Wife's Yukon XL 5.3L with 4.10s. I have towed once with it and although I cannot prove it, it did seem to tug my 6500 lb camper better especailly in the hills. I will tow with it again this weekend and see if I can tell a dif for sure.

 

However, my  MPG has changed for sure. I had an average of 6 or 7 fill ups prior to using premium and I was averaging 18.17 MPG. I have filled up twice (not counting towing miles) since using the 93 and the first fill up got me 20.23 the second was 19.77. The first tank was almost all Interstate at less than 75 MPH  and the second was non interstate at 60 to 65 with some city and several stops within the city. (My Wife's shopping stops). This is an average of 20MPG.

 

I realize this is not enough info to go the bank with yet, but it does seem true that the 93 will help MPG.

 

I also work with a guy who is Certified Ford Trainer, an ASE Master Tech, although he is no longer turning wrenches, and I discussed using 93 oct ,the spark advance, powere increase, MPG increase idea with him. He agreed with the entire theory, if you want to call it that. He has heard this before and completely agreed with it. Pretty smart guy even if he is a Ford Man.

 

Just to cut down on any questions: My wife drives like an old lady, I refueled the truck myself on all fueling mentioned above and can promise I filled it as equal on every fueling as possible. I run the tires at 37 PSI cold. The only mod to the truck is a TrueFlow CAI set up. I run only Chevron fuel with 3 ozs of Lucas Upper Cyl lube per 10 gal of fuel. I will report more as I check more tanks.

 

 

 

 

If you keep running that much lucas you're gonna foul out your plugs.

C & A s Dad Senior Enthusiast

C & A s Dad

Posted
  • Author
Posted

I am running 3 ozs per 10 gals of fuel which is what Lucas recommends. Of course I realize they are selling the product. You did not mistakenly think I was running 3 ozs per gallon did you.

 

I have been using Lucas in my work Dodge Caravans for years and to date, have never fouled a plug. My current Caravan has 58K on it and has had Lucas in every tank at the rate of 3 ozs per 10 gals of fuel.

 

I am curious as to your thoughts here and am not above changing what I am doing if there is really a threat of damaging something.

Frotax Enthusiast

Frotax

Posted
Posted

3.2 Oz per gallon is 40:1. I've ran plenty of premix in the mower and in truck. No problems.

 

3 Oz per 10 gallons is almost nothing. even 10/40 motor oil in the tank at 3 OZ per 10 gallons wouldnt hurt.

 

I know a guy who runs 1 quart of Klotz 2 stroke oil in his tank each time. His trucks run into the 500K range with no problems.

 

If I did it, I'd just run the 7 buck a gallon Pennzoil or Similar 2 stroke oil instead of the good stuff.

Steady Eddie Enthusiast

Steady Eddie

Posted
Posted

:thumbs:

 

Hey there--C&A's Dad--

 

Been off the forums here for a time..but am still digging out info

about the Vortec's ability to whack the heck out of the timing.

I have the GM Shop Manuals for the P12 Chassis Motorhome and

it DOES say in there that the darned PCM can, and does, have the

ability to yank fully 20-degrees of timing out of the advance tables.

For the guy like me, there is no fight back against it, other than using

a "Top Tier" Fuel (like Chevron) with the highest octane available.

Our Vortec L21 454 runs better and better, on Premium, pulls the hills

in a higher gear, runs cooler, yards our Jeep GCL around like it

wasn't back there, and on and on, all pluses, no negatives other

than price per gallon.

 

The PCM is quick to retard and very slow to re-advance. I personally

think that you must run several tankfuls of Premium through it, before

the PCM wises-up, and you gain back some lost power and performance.

 

I am very glad you tried the higher octane.

 

:banghead:

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