Originally Posted By: danielLD
I try to come on forums but I've had bad habits of staying on forums too, lol. If what you say is true, then it goes counter to what I've been able to prove with UOA. What others like Scott Kegarise and Terry Dyson, strangely have proven to be true as well.
With respect to HTHS, though, we cannot discount it. While I have no issue with a high VI oil and understand the benefits, look at the objective facts. Doug Hillary got laughed at years ago talking about HTHS. Look at where things are now, though. SAE J300 incorporates minimum HTHS values, and tighter ones than before. Just about every ACEA spec and builder approval out there specifies an HTHS minimum or an HTHS range. Just about every vehicle in the planet that you can think of with a fairly tight oil specification actually has their specification built upon HTHS, rather than SAE grade, even if SAE grade is specified. There are rather few exceptions.
Japanese and North American OEMs calling for a 5w-20 or 0w-20 aren't thinking of a Red Line 3.0 HTHS type 20. They're calling for an ordinary 5w-20 or 0w-20 as you'd find ILSAC certified. When you see an ordinary Japanese or North American vehicle specifying a 5w-30 with the Honda turbo spec or dexos1, you know they intend an HTHS of 3.0 or 3.1. You know very well what A3/B4 entails, what A5/B5 will get you, what CK-4 will get you, what FA-4 will get you. These are all calling for an HTHS range or a minimum.
I'm the first to admit advantages of high VI oils. However, I don't know of any of the specifications I listed that have a minimum VI incorporated, except indirectly insofar as you're not going to have a 0w-20 or a 5w-30 with a VI of 130.
The vehicles that simply specify an SAE grade with little thought to specification beyond that are exceedingly rare. My G37 does, calling simply for 5w-30 in SM or newer, with GF-4 or newer being only optional. Even some of the oil companies application guides agree that it can use anything from a basic 5w-30 SN/GF-5 to a dexos2/C3 or a CJ-4/SM, given that the severe service intervals are so short, concerns over a bargain basement conventional or a low SAPS oil are irrelevant.
I try to come on forums but I've had bad habits of staying on forums too, lol. If what you say is true, then it goes counter to what I've been able to prove with UOA. What others like Scott Kegarise and Terry Dyson, strangely have proven to be true as well.
With respect to HTHS, though, we cannot discount it. While I have no issue with a high VI oil and understand the benefits, look at the objective facts. Doug Hillary got laughed at years ago talking about HTHS. Look at where things are now, though. SAE J300 incorporates minimum HTHS values, and tighter ones than before. Just about every ACEA spec and builder approval out there specifies an HTHS minimum or an HTHS range. Just about every vehicle in the planet that you can think of with a fairly tight oil specification actually has their specification built upon HTHS, rather than SAE grade, even if SAE grade is specified. There are rather few exceptions.
Japanese and North American OEMs calling for a 5w-20 or 0w-20 aren't thinking of a Red Line 3.0 HTHS type 20. They're calling for an ordinary 5w-20 or 0w-20 as you'd find ILSAC certified. When you see an ordinary Japanese or North American vehicle specifying a 5w-30 with the Honda turbo spec or dexos1, you know they intend an HTHS of 3.0 or 3.1. You know very well what A3/B4 entails, what A5/B5 will get you, what CK-4 will get you, what FA-4 will get you. These are all calling for an HTHS range or a minimum.
I'm the first to admit advantages of high VI oils. However, I don't know of any of the specifications I listed that have a minimum VI incorporated, except indirectly insofar as you're not going to have a 0w-20 or a 5w-30 with a VI of 130.
The vehicles that simply specify an SAE grade with little thought to specification beyond that are exceedingly rare. My G37 does, calling simply for 5w-30 in SM or newer, with GF-4 or newer being only optional. Even some of the oil companies application guides agree that it can use anything from a basic 5w-30 SN/GF-5 to a dexos2/C3 or a CJ-4/SM, given that the severe service intervals are so short, concerns over a bargain basement conventional or a low SAPS oil are irrelevant.
