GS - 2nd Gen (1998-2005) Discussion about the second generation GS300, GS400 and GS430 (1998 - 2005)

Gas mileage...

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Old 06-04-06, 05:51 PM
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GS400kid
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Default Gas mileage...

I have recently switched from Regular Mobil 1 oil with Mobil 1 Truck&SUV 5w-30. since i had my 18s BBS replaced with a set of 19s Work, i expected the weight differences will make the gas mileage go down, and it did. But after the Truck&SUV Mobil 1, my gas mileage actually went up for at least 2.5-3mpg. I have tested it with doing 70mph on freeway and stay in speed limit in city in my last tank of gas, i got 22.5mpg. Before i can barely break it thru 19.5mpg. I have just filled up, I will try to see what do I get with 80mph freeway and speed limit in city.

Just wanna share with those struggling with high gas price and heavy foot!
Old 06-04-06, 06:09 PM
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GSteg
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I went from 12.6 to 14.0 mpg by seafoaming my engine and cleaning the MAF
Old 06-04-06, 06:12 PM
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Originally Posted by GSteg
I went from 12.6 to 14.0 mpg by seafoaming my engine and cleaning the MAF
I guess if you dont stay in M, you will gain another 4mpg
Old 06-04-06, 07:18 PM
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LiLS
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whats sea foaming and whats the maf?
Old 06-04-06, 08:10 PM
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Originally Posted by GS400kid
I guess if you dont stay in M, you will gain another 4mpg

The sad thing is, I put it in D and drove like an old man. I take it easy.


It's because of the horrible city driving. I do basically 100% city and there is stop and go every 15 or 20 seconds. Socal FTL
Old 06-04-06, 08:13 PM
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Originally Posted by LiLS
whats sea foaming and whats the maf?

Seafoam is a deterrant that cleans all the carbon deposit in your fuel delivery system, intake chamber, oil crankcase, etc. You can find a can at autozone.

MAF is Mass Air Flow. It should be right next to your intake box. It senses the air flow
Old 06-07-06, 02:15 PM
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Originally Posted by GSteg
Seafoam is a deterrant that cleans all the carbon deposit in your fuel delivery system, intake chamber, oil crankcase, etc. You can find a can at autozone.

MAF is Mass Air Flow. It should be right next to your intake box. It senses the air flow
thanks alot man
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