Spur
Well-Known Member
There is also a group 3+ that is as good as the group 4. Shell/Penzoil’s GTL oils(Gas to Liquid) are in this category. It is a very good oil and really provides all the benefits of a Group 4/5.Ya my understanding was that back in the day synthetics were all group 4. Mobil 1 was a 4. Then Mobil 1 started getting a lot cheaper and people found out they had switched back to a Petro blend also sometimes called a synthetic blend that is actually group 3 but sold as a synthetic. A lot of consumers got upset being tricked but commercially it was a success in sales so other synthetic oil manufacturers started selling cheaper group 3 "synthetics" to get in on the market. I only buy group 4 but only because I think the small cost is worth it, knowing full well a lower cost alternative would probably work just as well.
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