All 5Wxx oils seem to be labeled as syn-blend now since API SP/ILSAC GF-6A went into effect, the 10Wxx and SP rated monogrades are still labeled conventional but are probably made with group II base stocks, which I guess you could call "semi-synthetic"I know from reading here that many so called conventional oils are actually semi-synthetic, to be able to meet the new specs, but I am wondering if ALL conventional oils are, specifically Supertech 5w30 and 10w30 high mileage.
Synthetic is bad vs conventional because?Unfortunately I think all of the 5W and below are synthetic blends now. Fortunately 10W and up is conventional.
I don’t feel it adds any benefit really plus my cars don’t get driven a lot and I change the oil every 3000 miles or 3 months. Except my moms car we do 5000 or 5 months because it has to have synthetic.Synthetic is bad vs conventional because?
Wait, so if you only get 500 miles on in three months you change the oil? Dude, that's a shorter OCI than what people did in 1950.I don’t feel it adds any benefit really plus my cars don’t get driven a lot and I change the oil every 3000 miles or 3 months. Except my moms car we do 5000 or 5 months because it has to have synthetic.
All 5Wxx oils seem to be labeled as syn-blend now since API SP/ILSAC GF-6A went into effect, the 10Wxx and SP rated monogrades are still labeled conventional but are probably made with group II base stocks, which I guess you could call "semi-synthetic"
What does mom drive?I don’t feel it adds any benefit really plus my cars don’t get driven a lot and I change the oil every 3000 miles or 3 months. Except my moms car we do 5000 or 5 months because it has to have synthetic.
2017 CamryWhat does mom drive?
SN+ 5w30 and lighter had to be roughly 50% group III to meet spec unless it had the legendary Exxon Mobil mystery sauce base stocks. I would expect this to increase with SP.Most all conventional oils are group II. Group I conventional oils are rare these days in engine oils in the US and the oils that do contain group I are usually syn-blends with 15-30% group III to give it some thermal stability.
Given the price of synthetic oils these days, there's not much argument for sticking with conventional. The exception might be a drag racing engine spraying a lot of nitrous with low oil temps where the higher pressure-viscosity coefficient of conventional may be desired.
Some 5w-30 and 10w-40 conventional oils may contain a small amount of group III if they want to reduce reliance on viscosity modifiers and allow them to more easily pass API tests. I wouldn't be concerned about it really. For just a few dollars more, I'd buy an oil that's all group III or higher.
Unfortunately I think all of the 5W and below are synthetic blends now. Fortunately 10W and up is conventional.
I don’t feel synthetic is a better buy or anything. I have done the same things with conventional that I have with synthetic like cleaning a sludgy engine and stuff so I don’t feel the synthetic is worth the extra price. Based on what I have seen there is a price difference.Why "unfortunately"? They charge you the same either way. I also doubt many 10W-30's and even 40's don't contain some GIII nowadays, since it has been stated that it is almost more economical for companies to meet specs and that they have a lot of GTL laying around (SOPUS at least)....
Stop wasting oil then.2017 Camry
I’m not lol. My dad won’t let that one go past 5 months or 5000 miles neither will I. We use Mobil 1 in that one.Stop wasting oil then.