I was in the store the other day and I saw this Blended Mobil Brand Oil that had "23% more additives" that helps remove deposits. It was called Cleaning Oil or something. I also read on the brickboard that using plain synthetic oil will remove varnish and buildup. If I want to do my 245K engine some good should I try these products. I have used Castrol traditional GTX forever.
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1990 240- 245K- Original Owner-M-47, VX cam, IPD sprt springs, bilstiens, spt exh, euro lamps-turbo whls,- still slow but handles well- Near Houston
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