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Phillips Petroleum is a big, integrated oil company that has a huge research budget and probably makes its own base oils. The Unocal 76 brand is now also owned by them. Phillips 66 is also the second most popular brand of piston engine aviation oils, behind AeroShell.
In other words, I'm sure that TropArctic is an excellent product.
I had 13 trucks in one of my business's that I sold and we used Tropartic exclusively. The trucks oil was changed once a year wether it needed it or not and that usually meant about every 30-35,000 miles. They got started at 6 am and didn't get turned off til 7-8 pm. They were heavy duty gas and diesels. We did our own mechanic work and I can tell you first hand when we tore engines down with 150,000 miles they were spotless inside.Never had an oil related problem. Phillips pulled out of my area so I no longer have access to their products but I would use it if it were available.
Try this site, They carry it and lots of others too.
Deleted by moderator. Links to oil company homepages and product information sheets are encouraged for purpose of information sharing. But links to individual distributors is considered advertising. Although, I don't believe that was your intent. Thanks for your understanding. horsepuller, FTE Moderator.
Tim http://home.earthlink.net/~kc8fhs/ani/anglehappyface.gif