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Old 08-31-2017, 06:37 PM   #1 (permalink)
101Volts
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Join Date: Dec 2012
Location: Pennsylvania
Posts: 477

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

Woody - '90 Mercury Grand Marquis Wagon LS
90 day: 14.13 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: 21.86 mpg (US)

Happy Trails - '05 Ford Explorer
90 day: 16.45 mpg (US)
Thanks: 850
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Amsoil P.I. Gas Additive (Injector Cleaner)

I've used this a few times now. I'm not quite sure whether it's helping or not, it seems to be helping in fuel injected cars but not at all in the carbureted Caprice.

AMSOIL P.i. Performance Improver Gasoline Additive



Attempt 1:

1984 Caprice (5.0, Carbureted)

It doesn't seem as though it worked in this car or if it did, it didn't benefit the fuel economy. I also used 2 bottles.

Attempt 2:

1990 Mercury Grand Marquis Wagon

I was getting 18-20 and afterwards, got 22 in the same general driving. Maybe it had an effect?

Attempt 3:

2001 Impala w/3.4 Engine

This car was initially getting 20 MPG or so while I was putting 1-2 ounces of Renewable Lubricants' Injector Cleaner in with each tank. I then put 9 Oz. of Amsoil P.I. in one time and I'm not sure whether I saw much of a change or not; the car gradually went up to 25 MPG in the dame driving conditions. I recently added a full bottle and Father was driving this car on longer trips but only for 90-100 miles these last two tanks; the car has gotten 31 MPG these last two consecutive tanks. It's rated to get 32 HWY but 2/3 of the driving was closer to city driving; 3 miles to and fro work and 4 miles to and fro the grocery store.

Has anyone else here used this Amsoil additive? It might require a couple treatments on severely dirty injectors but I have recently read another post at this forum about injector replacement giving higher MPGs due to finer fuel atomization so perhaps there's a similar case here?

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