Avg Mileage
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Join Date: Mar 2008
Location: Pacific Northwest USA
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My 5.3 got 12-13 in town and 20+ on the highway.....even as high as 23mpg a couple times when I was gentle and set the cruise at 65mph (borrrrrr-ing!)
Thirty five miles isn't very long to esatablish a meaningful average, IMHO, but 10.6 mpg sure sounds low if it was steady-speed driving
Cheers
DD
Thirty five miles isn't very long to esatablish a meaningful average, IMHO, but 10.6 mpg sure sounds low if it was steady-speed driving
Cheers
DD
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#8
Our '85 XJ-S v12 Coupe gets 14-15L/100kms (about 16mpg USA, and 19mpg Imp) around town, and we got those dumb 50kph speed limits all over the place.
The last cruise we took it on, all the way around the Aussie coast road, about 15000kms, we averaged 11.2L/100km (about 21mpg USA, and 25mpg Imp) for the whole trip.
I used the cruise some of the time, and as Doug said BOOOOOOOORING. I mean some of those roads were straight as they come and unsealed and fun, and a V12 at "full cry" is just sooooo sweet.
The last cruise we took it on, all the way around the Aussie coast road, about 15000kms, we averaged 11.2L/100km (about 21mpg USA, and 25mpg Imp) for the whole trip.
I used the cruise some of the time, and as Doug said BOOOOOOOORING. I mean some of those roads were straight as they come and unsealed and fun, and a V12 at "full cry" is just sooooo sweet.
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Usually the "to do list" gets out of control. and the ever forgiving V12 will allow some serious deviation before kicking your butt.
Ours does not vary too much from "fun, to cruise". Too much of the gentle stuff is not so good for the V12, it must be DRIVEN, and seems to actually thrive on it.
OK, fun now is less than it was due to age (mine) and police type non humourous persons.
When I want to overtake some lesser car on the open highway, I usually get right into it, and top side of the tach and speedo is often seen.
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just the general "tune up" type things. The car needs to be the way it was from the factory. Now i don't meed flawless just efficiency wise.
There isn't much to do about engine wear, you can obviously change seals and replace things or make sure your valve clearances are right but really its just plugs, wires, dist, good gas, air filters, cats are still in working order.
those kinds of things....as i said my plugs were at 40 instead of 25..so they weren't working at proper efficiency so now my mpg and power should increase even if its the tiniest bit.
everything counts
If everything is as it should be then the driver is at fault..
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