Does anyone have actual experience with mobil 0w-20afe offering better cold starts then your average 5w-20 synth (PP, QSUD, Synpower, etc). I am thinking of giving it a try next winter, and I am wondering how much of a difference it can really make.
Well, I switched from Mobil 1 5w30 to 0w30 in my Frontier and was very pleased with the cold start behavior. I actually saw my around town mileage increase a bit as well, averaging almost 18 mpg on the shorter trip driving I do in the winter as opposed to maybe 17+ over the last three winters. Engine sounds quieter on cold startup as well.
comparing it to an oil like, say, PU 5w-20, which has a cst at 40C in the 46.xx range, 0w-20 AFE is only marginally lower, in the 44.xx range at 40C, IIRC. I'm only quoting from memory. Some 5w-20 syns, like M1 5w-20, has a cst at 40C at something like 50.xx. still, the AFE 0w-20 should offer a little better cold starting and flow, which is why i'm going to give it a go soon.
Originally Posted By: moviedave
Does anyone have actual experience with mobil 0w-20afe offering better cold starts then your average 5w-20 synth (PP, QSUD, Synpower, etc). I am thinking of giving it a try next winter, and I am wondering how much of a difference it can really make.
Had PU 5w20 in the Mazda for 10k miles. Worked fine. No complaints. Put M1 0w20 in last week. A bit more quiet at start up but I attribute that to the oil being new.
Originally Posted By: moviedave
Does anyone have actual experience with mobil 0w-20afe... I am wondering how much of a difference it can really make.
Well, if you are a oil-sensitive and oil impulsive kind of guy (I take that is why you are at this site), then yes, it makes a difference, and I imagine that it really does make a difference. Not that a 5W20 would not do just fine up here in Minnesota either.
I have used 5W20 Amsoil XL, 0W20 Amosil, and Mobil 1 in regular 5W20 and EP 5W20 and 0W20. Personally, I prefer the latest brew of Mobil 1 0W20, as my own experience on the 30 to 40 below days and even just above zero it performs better that the others I have used.
We've used it in the Fit for the past year. It's had no problems starting the few times it's gone below 0*F here. The engine running 4 quarts of M1 0w-20 starts more easily than the Buick does running 5 quarts of synthetic Quaker State 5w30.
Originally Posted By: moviedave
Does anyone have actual experience with mobil 0w-20afe offering better cold starts then your average 5w-20 synth (PP, QSUD, Synpower, etc). I am thinking of giving it a try next winter, and I am wondering how much of a difference it can really make.
It entirely depends on what start-up temps you're talking about.
At room temperature M1 will be about 8% lighter than PP 5W-20.
Castrol Edge 0W-20, one of the lightest oils available will be 30% lighter the PP.
At freezing (0C) M1 will be about 13% lighter than PP and Edge will be 45% lighter.
At -10C M1 will be 16% lighter and Edge 52% lighter.
As the temp's continue to drop M1's relative advantage will continue to increase against PP and will eventually turn the tables on Edge, since they are GP III based oils.
At -40 degrees M1 0W-20 is the lightest oil you can buy with a MRV viscosity of 10,400cP.
Hey Cat
I've enjoyed your comparisons before, in fact, I've saved your August narrative on HTHS as one of my favorites.
What type of calculations are you using to come up with this data?
I tried to insert the KV40 and KV100 spec's of the 3 oils mentioned but they wouldn't stick so you'll have to insert them yourself. They are:
M1 0W-20 KV40 44.8cSt KV100 8.6cSt
Edge " KV40 38.62cSt KV100 8.85cSt
PP 5W-20 KV40 46.84cSt KV100 8.48cSt
Since you read my piece on HTHS vis vs the KV100 you'll know it's not always easy to compare oils with different chemistries using kinematic values but in this case all three have the same HTHS viscosities and their KV100 spec's are very close. The graph is pretty good in extrapolating down to about -10C but that's about it.
"As the temp's continue to drop M1's relative advantage will continue to increase against PP and will eventually turn the tables on Edge, since they are GP III based oils."
Are you implying that you believe or suspect Mobil 1 0W-20 is primarily Group 4 or Group 5? Since I just purchased a vehicle that specifies either 0W-20 or 5W-20, I've been monitoring threads discussing these viscosities and you seem to speak pretty highly of M1 0W-20. Temperatures in my climate at their coldest reach single digits, but it's been years since it went below zero. Do you think M1 0W-20 would still offer a significant advantage over other 0W-20s or 5W-20s in my climate?
Yes I think M1 0W-20 is primarily PAO, I don't now how it can achieve it's -40 degree MRV viscosity otherwise.
But just down into the single digits fahrenheit it will of course still offer a significant advantage over all 5W-20 dino's and will be about 20% lighter than most 5W-20 syn's with the exception of Edge 5W-20 which is slightly lighter.
Compared to other 0W-20's, it's on par with Valvoline and lighter than Amsoil to name two but as I've indicated with Edge 0W-20 it's not in the same league the other ultra low vis', high VI 0W-20's from Toyota, Honda, ENEOS and CAM II which have similar performance to Edge 0W-20.
Originally Posted By: Boomer
Well, I switched from Mobil 1 5w30 to 0w30 in my Frontier and was very pleased with the cold start behavior. I actually saw my around town mileage increase a bit as well, averaging almost 18 mpg on the shorter trip driving I do in the winter as opposed to maybe 17+ over the last three winters. Engine sounds quieter on cold startup as well.
Same here, though I know a PA winter and a TX winter are two different things LOL. We did get some cold air here last week (5 to 10 degrees overnight), and I was impressed with the 0W-30. Oil pressure was right up and the notorious VQ startup knock wasn't there either. I'm going to keep running the AFE in my truck year round.