Beav,
The 5W30 is to prepare it for winter... Won't be driving the car much after this month.
A quart every 1500 miles isn't too much for me to handle at this point, and the car only smokes at full throttle, and only very little.
I was using the Amsoil engine flushes, two bottles so far. I might try the products you recommend, and run dino oil between those flushes.
VK
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