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Re: Mileage modifications
abcde06991 #733454 February 25th 2018 12:40 pm
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I get 15 out of my 90 Chevy. 350 3:42 gears. G20. 75mph highway, a.c. on.

Re: Mileage modifications
frscke1 #733456 February 25th 2018 5:04 pm
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10-12 sounds about right, id be willing to put some money into it. Whats some things i could do that'll be cost effective and on the cheaper end?


95 GMC 3/4 Vandura Traveler by Explorer Conversion
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Re: Mileage modifications
abcde06991 #733457 February 25th 2018 7:07 pm
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Find gas without ethanol, that should help! I have hand written calcs on mileage and mpg from the first owner in 1984. He was getting 14-17mpg in the same van. I haven’t done better than 15. Most often closer to 12. There wasn’t ethanol back then, can’t think of any other changes that would make that big of a difference.


Jason
2008 Ford E-250 4x4
1984 Chevy G20 5.3L/4L60E (SOLD)
Re: Mileage modifications
JAGI410 #733459 February 25th 2018 9:40 pm
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Originally Posted by JAGI410
Find gas without ethanol, that should help! I have hand written calcs on mileage and mpg from the first owner in 1984. He was getting 14-17mpg in the same van. I haven’t done better than 15. Most often closer to 12. There wasn’t ethanol back then, can’t think of any other changes that would make that big of a difference.



I can. How about 33 years of wear and tear on the drivetrain? Ethanol does have a lower stored energy than pure gasoline, but there are many reasons other than fuel mixture to explain a 3-5 MPG drop over 33 years. I wouldn't stress about finding ethanol free gasoline.

Last edited by Reed; February 25th 2018 9:40 pm.

Windows- they're what make a van worth owning!
Re: Mileage modifications
abcde06991 #733465 February 25th 2018 10:54 pm
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SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: Mileage modifications
abcde06991 #733474 February 26th 2018 11:53 am
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I put a new crate engine in my 90 a year ago. Got more zip. Mileage is up a little . Same tbi .160,000 miles takes its toll in efficiency. I drive all over the country and buy all kinds of gas. I can't really tell any difference ethanol or not but haven't really checked. It seems I go the same distance on a tank though. When I'm on the road for three or flour weeks I don't really care I just buy it.

Re: Mileage modifications
abcde06991 #733479 February 26th 2018 2:44 pm
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Dunno how the availability of it is over there but LPG conversion is one way to save money.


79 chevy G30 cobra camper conversion.
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