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Search: Posts Made By: StarINSIGHTS
Forum: Grand Cherokee - WK 01-20-2011, 05:24 PM
Replies: 20
Views: 1,469
Posted By StarINSIGHTS
Re: Mileage drop

I use NGK 6987 with AMSOIL Air / oil Filters and Lubricants, After the change I gained 4 miles per Gal, also used the AMSOIL PI Gas additive( 4,000 miles) to clean up the system.

I bought a 1...
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