quote:The point of this topic was about GF-5 standard. Conventionals will be able to meet that standard.
Dave....define conventional oil. Do you mean group II ??
I doubt very much that conventional oil will meet the GF-5 spec without the use of synthetic oil in the mix. Even if some product does manage to arrive that is totally conventional but claims to meet the GF-5 standard,I think it will have issues compared to a premium group III,or my preference.....Group IV. My concern with conventional oil is.. too high noack volatility,oil film sheering,oxidation,oil film strength too weak,and so forth.
When dexos hits,it will put GF-5 at the bottom. The pecking order will be something like this.....GF-5(the lowest minimal standard).......DEXOS(GROUP III)(middle standard).....and the best being....Group IV(the highest standard) as usual.
Your car,your engine,your investment,your money,your choice.