I had a bunch of straight 30 and straight 40 weight oil once. I ran the SAE 30wt in the "winter" here, and SAE 40wt in the summer months. So even a 10w-xx is not necessarily needed.
Best for what?I would skip most 10W oils simply because they are not the R&D focus of anyone. Mobil's best, for example, is not going to be a 10W anything. A 5W-30 should be robust enough for most cases. Maybe if you are talking about a 40, 50, or 60 there could be advantages.
That's a good point as well. The chemistry in the Mobil 1 EP grade should be the same though, I would think, compared to the other grades. I was going to run M1 EP 10w30 through winter just for the heck of it knowing it may contain less VIIs. The flash point is noticeably higher in that particular grade too, which I though was interesting (although mostly likely meaningless).I would skip most 10W oils simply because they are not the R&D focus of anyone. Mobil's best, for example, is not going to be a 10W anything. A 5W-30 should be robust enough for most cases. Maybe if you are talking about a 40, 50, or 60 there could be advantages.
Still a modern SP … just not dexos 1.3 unless 0W20 or 5W30 …That's a good point as well. The chemistry in the Mobil 1 EP grade should be the same though, I would think, compared to the other grades. I was going to run M1 EP 10w30 through winter just for the heck of it knowing it may contain less VIIs. The flash point is noticeably higher in that particular grade too, which I though was interesting (although mostly likely meaningless).
Vii get broken down not just by heat but chemically by fuel dilution.10w30 seems to handle dillusion a lot better than the 5w or 0w versions.
My ecotec doesn’t sound like a box of hammers at 1500 miles using a 10w instead of a 5w
ahah i was hoping that a 10w oil would be thicker. kinda like if we coat a aluminum baking pan with water vs if we coat it with an oil. the oil will stick to the pan more then the water and provide more of a cushion compared to the water.@apollo18 - you had me on your side, right up until the “larger film strength/stickiness” comment. Huh? What?
At 10 WX oil is gonna be just fine in your climate, but you’re not gonna get some major improvement in “stickiness”, or whatever that means.
Perhaps when engines start having aluminum baking pans and water in them.ahah i was hoping that a 10w oil would be thicker. kinda like if we coat a aluminum baking pan with water vs if we coat it with an oil. the oil will stick to the pan more then the water and provide more of a cushion compared to the water.
so i was hoping a 10w oil since it is thicker would provide more cushion for the parts compared to a thinner 0w oil but don't think there really is a drastic difference in that property
All 10w-XX oils will perform perfectly at least down to freezing 32 deg. That's an easy rule of thumb to remember.So what would you think the coldest temperature you would be comfortable running a 10w-xxx oil - for curiosities sake?
ahah i was hoping that a 10w oil would be thicker. kinda like if we coat a aluminum baking pan with water vs if we coat it with an oil. the oil will stick to the pan more then the water and provide more of a cushion compared to the water.
so i was hoping a 10w oil since it is thicker would provide more cushion for the parts compared to a thinner 0w oil….”
10 W- x should be good to -25 C (-13 F), but I use 0w30 from Dec 1 until spring. Regarding VI issues take notice how many high performance oils are out there that are 0w40 including oil recommended for the Corvette and Challenger.All 10w-XX oils will perform perfectly at least down to freezing 32 deg. That's an easy rule of thumb to remember.
Of course. 10w-oils can go MUCH lower than freezing, but I though it was an easy rule of thumb to remember.10 W- x should be good to -25 C (-13 F), but I use 0w30 from Dec 1 until spring. Regarding VI issues take notice how many high performance oils are out there that are 0w40 including oil recommended for the Corvette and Challenger.
Usually this hypothesis is phrased like, "it doesn't matter how fast the oil gets there if it never left in the first place."i was also hoping that maybe a 10w would have a larger film strength / 'stickiness' compared to a 0w which would mean the oil would stick to the parts more vs all draining to the pan as a 0w would but maybe that is just assumption