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Old 09-12-2020, 03:29 PM   #3 (permalink)
Master EcoModder
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Join Date: Dec 2012
Location: Pennsylvania
Posts: 491

Grandpa's Caprice (retired) - '84 Chevrolet Caprice Classic
Last 3: 20.76 mpg (US)

Woody - '90 Mercury Grand Marquis Wagon LS
Last 3: 19.57 mpg (US)

F.E. Brick - '99 Chevrolet K2500 Suburban LS
Last 3: 12.94 mpg (US)

Mom's Car - '01 Chevrolet Impala Base
90 day: 19.96 mpg (US)

R.J. - '05 Ford Explorer 4wd
90 day: 19.52 mpg (US)
Thanks: 876
Thanked 33 Times in 27 Posts
It depends on the car, and what quality of parts and consumables (engine oil, filters, etc) that I use. Some things are "by the book," other things take longer since I really don't need to change them. I do use Amsoil products where I can, which includes their Performance Improver (Injector Cleaner.) I also change the power steering fluid occasionally, even though not all manuals say that you need to. I've seen how the fluid eventually gets burnt and turns black, if you don't.

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