Fuel Milage

NoDOHC · 03-02-2011, 11:58 PM

My record mileage stock ('86 6-port N/a) was 31.2 mpg. This was driving through Ohio Westbound on a 95 degree day at 85 mph (that is how fast the traffic was going). At 85, I was turning about 3200 rpm (which backs up Ted's theory).

We should have a sticky on here somewhere for mileage tips:
Don't lug below 1,500 rpm.
Don't rev past 3,800 rpm (as Ted said, try to leave a little margin here).
Do not move the throttle any more than necessary.
Try to keep speed above 60 mph.
Advance timing 10 degrees or so.
Remove power steering belt for long trips.
Keep new spark plugs.

This should get you into the mid 20's consistently. My '91 with power steering connected Automatic trans, etc, will give 28 mpg highway (more like 21 city).

03-02-2011, 11:58 PM	#17
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin Posts: 855 Rep Power: 17	My record mileage stock ('86 6-port N/a) was 31.2 mpg. This was driving through Ohio Westbound on a 95 degree day at 85 mph (that is how fast the traffic was going). At 85, I was turning about 3200 rpm (which backs up Ted's theory). We should have a sticky on here somewhere for mileage tips: Don't lug below 1,500 rpm. Don't rev past 3,800 rpm (as Ted said, try to leave a little margin here). Do not move the throttle any more than necessary. Try to keep speed above 60 mph. Advance timing 10 degrees or so. Remove power steering belt for long trips. Keep new spark plugs. This should get you into the mid 20's consistently. My '91 with power steering connected Automatic trans, etc, will give 28 mpg highway (more like 21 city). __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)

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