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Frank, Thanks for the info. I'll leave the ARX in, and change the car back to a synthetic on the next oil change. I was extremely skeptical about this product when I first start reading about it. But after all the glowing reviews, I figured I'll give it a try. I've used it in the...

The check engine light came on, and the care seems to be misfiring. But this is probably the spark plugs... for some reason I seem to go through an inordinate amount of plugs on this vehicle. Every time the check engine light comes on, it turns out to be the plugs. But it doesn't appear to be...

ARX and overheating I am about 1,000 miles into my rinse phase of an ARX treatment on a 1997 Saturn SC2 with 150K. There was never any problems with the vehicle except some oil burning, (1-2 qts every 3k). Oil changes were done between 3-4k using mobil 1 5W-30 since the 50k point. I switched...