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Old 08-31-2017, 06:37 PM   #1 (permalink)
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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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Old 09-01-2017, 03:53 AM   #2 (permalink)
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I tried the Redex version, but didn't notice any difference.

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Old 09-01-2017, 02:26 PM   #3 (permalink)
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Old 09-01-2017, 11:00 PM   #4 (permalink)
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Most of the gas around here, these days, claims to have various additives in it, and honestly these days cars don't seem to suffer from fuel-related issues like they used to. Even the older vehicles (which most are in my fleet), so that discounts it being due to more modern engines. I haven't noticed any appreciable effects of injector cleaners in ages, and I assume this is why.
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Old 09-02-2017, 01:49 PM   #5 (permalink)
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In USA, "Tier I" fuels must contain an EPA-mandated minimum "cleaning" content; however, MOST major fuel companies (but NOT all) are advertising their respective fuels as having MORE than the minimum.

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