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Old 01-29-2009, 11:34 PM   #8 (permalink)
Depends on the Day
RH77's Avatar
Join Date: Nov 2007
Location: Kansas City Area
Posts: 1,761

Teggy - '98 Acura Integra LS
Sports Cars
90 day: 32.74 mpg (US)

IMA - '10 Honda Insight EX
Team Honda
90 day: 34.76 mpg (US)

Tessie - '06 Acura TSX Base
90 day: 28.2 mpg (US)
Thanks: 31
Thanked 41 Times in 35 Posts
I'll have to admit, I'm running 91-octane because it's cheaper too

I still get a bit of pinging at around 6000 RPM / WOT. It's a rare event, but there's an up-hill onramp around here that requires a 2nd gear windout to merge.

I have found that the hotter the engine runs, the better the FE. Advanced timing, blocked rad, 200-210F coolant temps, and 100F+ IATs are a perfect storm for city driving.

Regarding the piston soak -- this actually saved an overheated '93 Chevy K2500 350 V-8. It was nearly seized, but the Seafoam soak saved it.

Plugs -- Hmm. This could be debated. Gap, indexing, temperature and electrode(s) material all play a part in FE. Honestly, I'll have to look up what I did with gap -- perhaps wider. I think I went with the NGK's last tune-up. The wires crapped-out early -- I should've saved the receipt for a free refill.

Curious about the EGR cleanse. I'm sure 140K miles have built-up enough carbon to choke things off a bit in my ride.

Stay warm in SoCal

“If we knew what we were doing, it wouldn't be called research” ― Albert Einstein

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