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#1359350 - 02/01/09 06:14 PM What's In Pennzoil Gas Mileage Improver
MrBiglund Offline

Registered: 12/12/06
Posts: 131
Loc: Canada
Hey, guys, i had bought some pennzoil yellow bottle dino 5w30 some time back from walmart (4.73 litre jug for $10.00) and it came with a free bottle of pennzoil gas mileage improver. I'm just wondering what is this stuff? Is this a upper cylinder lubricant? solvent? injector cleaner? water remover? I haven't added any yet to my gas, but was thinking about doing so. Is it ok to add it after an oil change? Or is it better just to add it right before doing an oil change? Will it in any way contaminate the new oil? Please enlighten.

Edited by MrBiglund (02/01/09 06:14 PM)

#1688309 - 11/29/09 06:49 AM Re: What's In Pennzoil Gas Mileage Improver [Re: MrBiglund]
cjcride Offline

Registered: 11/06/09
Posts: 1480
Loc: Ontario Canada
Contact Penzoil.

#1688581 - 11/29/09 01:33 PM Re: What's In Pennzoil Gas Mileage Improver [Re: cjcride]
paulo57509 Offline

Registered: 07/13/03
Posts: 1909
Loc: Tracy, CA
Probably more wax. whistle
1987 Chevrolet Camaro IROC-Z 5.0L
1987 Acura Legend L Coupe 2.7L (5-Speed)
1992 Lumina Euro Coupe 3.1L
1998 Lexus LS400
2003 GMC Safari

#1688602 - 11/29/09 01:55 PM Re: What's In Pennzoil Gas Mileage Improver [Re: paulo57509]
dwendt44 Offline

Registered: 05/17/06
Posts: 3589
Loc: Central Wisconsin
If you add it to the fuel tank, it's likely a injector cleaner.
Any clues on the bottle itself?
There's no such thing as:
Too big of a battery,
Too large of a gas tank,
or too loud of a horn,
or too bright headlights.

#1688605 - 11/29/09 01:58 PM Re: What's In Pennzoil Gas Mileage Improver [Re: dwendt44]
mechtech2 Offline

Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
Some guys like to change their oil after using injector cleaners.
I don't see it as necessary. Any doo doo is going down the exhaust pipe.