Ventilator

Right in your wheelhouse?

How about 21-22 overall average on 87? With the exception of the 10 gallons of 88 (87 not a choice) I put in in Wyoming to top off my tank, all I have burned is 87. I did get 26.1259 MPG on 13.810 gallons (360.8 miles) burned off that tank of 16 gals of 87 and 10 gals of 88 mixed going through Yellowstone and coming out the East side to Cody, WY. This was a lot of low speed (45 and under mostly) in Yellowstone and switchback dropping in elevation to Cody. I might need to experiment with 89 back here on flatter ground and 750' elevation? But I don't have any spark knock with 87, and I can easily get 24+ MPG on the highway (55 MPH). The 5.3 is designed for 87, and I get great mileage. I was getting great mileage at higher elevations in the Rockies. So if we use the recommended 87, we are all Cheap Asses? Never made the connection!

X3

Just testing you. My cousin has two '70 SS's with the 396, cowl induction hoods. They are my favorites in that body style, 4 headlights, and the square taillights.

'71 or '72?

You must have missed the sarcasm? hehe Hey, this thread was supposed to be about carpet in the wheel wells. Dodge, er Ram don't have that!

6.4L Hemi

Thanks. You see a truck in those pics? Top three Elk Mountain Snowy Range, Wyoming. Bottom three Badlands, South Dakota. All last week. And yes that is snow in pic #3.

No neutral coasting while descending at all. Zero. I was letting the truck do it's thing, engine braking. Sometimes it would actually downshift 2 whole gears, depending on the grade and speed. All those numbers were within 1.77 tenths MPG when it was all said and done. I know that some have reported up to 5 tenths MPG margin of error from tank to tank between the DIC and hand calculations. I have also had up to 5 tenths on some tanks here at home over the last year, but this 3800 mile trip is a much bigger/better statistical sample/example overall. At the higher elevations, I was actually getting in the low to mid 20's MPG while cruising @ 80 MPH in V8 mode. When I was in V4 mode, it was high 30's and even low 40's at times on the flat tops. My truck loved the higher elevation. Here at home it is only 735-750 feet, on average. The DI engine is much more responsive than other older gas trucks I have driven in the mountains. Not diesel level, but much better. Years ago (2002) on an elk hunt in Colorado I drove my buddies Power Stroke in the mountains, it was impressive even with a fully loaded trailer behind it. No towing on my trip though, so can't give any comparisons on that. Never felt underpowered on the entire trip, not once. Very happy with the performance, and absolutely no hiccups. Hope everything stays the same after my trip to the dealer next week for the piled up recalls that I was avoiding until after my trip.

3800 mile trip to/thru the Rockies and back. Stock Z71 GMC 4x4 DC with 5.3 and 3.42 gears. Some impressive new numbers, and hand calculated (21.723 MPG) out to within 2 tenths/MPG (21.9 MPG per DIC) overall. That is only 31 miles or 1.417 gallons of error in a 3,800 mile trip overall. That error could be in the pumps, the DIC, or my ability to fill the tank exactly at the first tank and the final tank. All tanks in between would not matter, just accurate records of gallons used and miles overall. Now understand, some of these numbers were from going down grades from 8-10%, and at times may have been steeper. But, also remember I had to drive up just as many as I was able to come down, and I was generally only getting 13-14 MPG while ascending these grades. Speeds on the Highways/Freeways/ Expressways/Interstates ranged from between 55-80 MPH. Some driving in towns/cities ranged from 25-45 MPH, and most of the National Parks had a 45 MPH speed limit. No, I didn't take any pics while going 80 in WY, but I did snap a few @65 MPH somewhere along the line. I was not driving like Granny either, more like I stole it. Quite IMPRESSED, to say the least!