Originally Posted By: lubricatosaurus
Originally Posted By: alarmguy
Red Line - Mobil 1 - Lucas - Quaker State - Pennzoil - Valvoline, etc, etc ... where is the proof? Do these companies
EVER supply you with any facts and real API tests showing their oil surpasses API specs? Nope
SOPUS (Pennzoil) used ILSAC GF–5, ASTM Sequence IIIG piston deposit tests, revealed in pictures at
http://synthetics.pennzoil.com/ to state:
"Pennzoil Ultra Platinum™ keeps pistons up to 25% cleaner than Mobil 1; and up to 35% cleaner than Valvoline® SynPower®. Pennzoil Platinum® keeps pistons up to 8% cleaner than Mobil 1; and up to 17% cleaner than Valvoline® SynPower®." They used to include Castrol Edge in that, not any more for some reason (maybe formula change at Castrol?).
Amsoil showed the Seq IIIG at
https://www.amsoil.com/lit/g3320.pdf
Once in a while Seq IVA cam wear tests are divulged, showing synthetics doing well:
Kendall released some results:
https://bobistheoilguy.com/forums/ubbthreads.php/topics/1700659/1
More at
http://www.amsoil.com/lit/g3115.pdf
Castrol SynBlend (now replaced by Magnatec) claimed Seq IVA below around 20 on their bottles a while back.
But the question still begs for an answer, where is the proof? Its EASY to pull out ONE test where an oil exceeds another, like piston deposits, so what? I could most likely add clorox to my oil and clean my engine at a drastic cost of wear.
ALL I AM suggesting, is if someone is going to buy an oil at a premium price, make that company prove to you that it exceeds other oils in the COMPLETE SERIES OF API standard/tests and European tests, thing is, most cant. Hmmm ... NONE CAN because no oil company publishes their COMPLETE results against all other oils, so you are only buying marketing.
I will grant one hooray to Amsoil, the ONLY oil company that publishes some series of tests.