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Originally Posted By: PandaBear Originally Posted By: bloc0102 Problem is that it has Shell's tracer in it, so they'd be on the hook for any engine damage that could result from using say a 5W20 instead of a 5W30... A UOA can easily prove that it is not your exact formula. I'd more worry about...

Originally Posted By: GMGuy Sounds like the magazine went all chicken little on that topic. So what if its a mix of 5w30 and 10w30? Its not as if you end up with 20w50 in a 0w20 bottle. What an end buyer does with the product is up to them to see that it meets specs of what it is eventually sold...

Originally Posted By: ctrcbob Is the NARB the same people who ten years ago, said that it was OK for Castrol to say their Castrol Syntec was synthetic, even after Mobil found that the Castrol Syntec was a Hydrocracked (GroupIII) oil, not a true Synthetic? Anything with a Group III base stock...

Originally Posted By: jmac Originally Posted By: cheetahdriver Originally Posted By: bloc0102 Just a note on oil marketing...you can't market an oil as a 15W if it passes a 10W CCS. i don't think that's right. the SAE J300 specs are "below xx" with no lower limit set for each XXw range. IIRC...

Originally Posted By: mechanicx With HD oils you have primarily 15W40 conventional and then 5W40 group III synthetic. It seems they need the 40 grade but does anyone else think there should be a 15W40 synthetic that is on the light end of 15W and heavier end of 40 grade, or maybe a 10W40...

Originally Posted By: Pablo Originally Posted By: sbergman27 do Amsoil's non-XL oils even look like they would meet the Phosphorus and Zinc requirements that the auto industry just recently threatened to withdraw support for API (as opposed to ILSAC) certifications over? -Steve Not only do...

Just want to add that Group V is 'everything else' that won't fit into Groups I-IV...could be better, could be worse...

Cenex now makes a Full Synthetic 5W-40, that also reduces your 'carbon footprint'. Maxtron Enviro-Edge 5w-40. CJ-4/SM rated. Find the tech spec sheet here: https://www.cenex.com/portal/server.pt/community/3lubricants/319/products/9398 They also have a Total Protection Program for 10...

From what I have heard about Amsoil, is that they meet all API Certifications, but do not pay for the actual licensing. Why, is beyond me, since it costs ~$700,000 to pass the API SM/Ilsac GF-4 engine tests, which I'm assuming they (or their additive supplier) pay for. I've heard with the their...