0w40 mobil 1 synthetic

[Bluefire]

Is there anyone using 0w40 M1 Synthetic? Unfortunately they don't offer the 10w40, which is what I would like. I am in socal, so I don't exactly see too much cold weather, mostly moderate to high temps... I also thought about the 15w50 but seems a little too thick... My cousin with a GTR has been mixing some 10w30 and 15w50 in hopes for something close to a 10w40, but I heard the resulting viscosity can not really be known unless tested... So what are you guys running.... Also what filters are you using... M1 filters a freakin pricey!!!

-Bluefire

[Wulfgang]

They don't have 10w40 because it's synthetic (the 10 and 40 are referenced to dino oil), but don't let that bother you. If what you need is 40w when the engine is hot, then 0w40 is what you want. It'll just be more slippery than the dino 10w40 when the engine is cold, which is good.

[GTR Shop]

Mixing oils?? OMG! I'd hate to see what the mains and BEs look like.You CAN'T repeat CAN'T mix different viscosity oils! They are chemically different!

FRAM filters, Genuine are all good..

[PalmerWMD]

I would also stay away from home brewing oils.

Even tho the exact example, you mentioned, it wouldnt be a problem as the additive chemistry is the same ( same oil formulation) and the exact vicosities you mentioned happen to be VII free in Mobil1 10w-30 and 15w-50.

Its the VII's and their unpredicatbility in home brews that make for problems with mixing sometimes, even if in same brand and line of oil.

In this particular example no problem:Mobil1 10w-30 is VII free and 15w-50 also,or nearly so.

I dont think a 15w-50 would be too thick for a turbo run in SoCal in summer.My SR runs on M1 15w-50 right now and I am in KY.The Australians whose temps approximate SoCal summers run even thicker sometimes ( they sell 25w-70 over there and a couple of 60 weights)

In summer Mobil1 15w-50 or another full syn 50 weight is likely a good call.In winter the Mobil1 0w-40 will be a good choice IMO.

Fred..

[PROJECTRB240SX]

I RUN 5W-30 SYNTHETIC BLEND ALL YEAR ROUND. I'M IN AZ SO WE GO FROM 30-40 DEGREE WINTERS TO 120+ DEGREE SUMMERS. MAY CAR HAS GONE THROUGH A FULL YEAR WITH THAT OIL VISCOSITY.

[blk90s13]

10-30 is wut i am planning on running castrol full syn

i ran it on my SR and it was fine till it blew haha

NJ gets about 10-100 weather

wuts recomended

[Bluefire]

Well we just hit our first 100 degree day in socal yesterday, but forecasters say it should cool down a lot... So I believe I will try the 0w40, and when it gets hotter switch over to the 15w50...

Also what is the process to switch over to synthetic... I'm pretty sure my RB has not been using synthetic. I have heard that I should use some low viscosity regular oil like 0w20 to clean out the engine since it only has about 21,000 miles. But how long do I run the oil for before switching to a full synthetic?

-Bluefire

[mambastu]

We generally use Mobil 1 15/50 in CA's and RB's in the UK. The 0/40 is a bit too thin for the hydraulic lifters and big-ends.

[PalmerWMD]

Mambastu:

Right on.Americans have been barinwashed a bit to wear oils of proper weight.Mostly cuz major manufacturers use thinner oils as a bandaid to lower cafe fines.

M1 15w-50 in summer, M1 0w-40 in winter in a turbo engine.

Or similiar weights from Redline and other premium syns.

Fred...

[PalmerWMD]

PS:M1 0w-40 is a much better choice than many thinner oils being used.

If you are afraid of a 50 weight use at least a good 40 weight like the M1 0w-40.

Fred...

[Red Lightning]

Is it worth it to use Synthetic blends? I have heard that it's less that 20% synthetic oil. Is that true? Does what brand of synthetic really matter? I use 20w50 in my Talon, and 10w40 in my 200SX.

[PalmerWMD]

1)Is it worth it to use Synthetic blends? 2)I have heard that it's less that 20% synthetic oil. Is that true? 3)Does what brand of synthetic really matter?

1+2) Some blends perform real well. Yes its true many have only smaller portions of full syns in 'em.

3)Some Blends meet high specs. for example ValvolineDurablend meets ACEA A3, a very tough spec much tougher than our API specs.And yet it displays good detergency.

Conflicting requirements sometimes and the better blends can be a great value depedning on your application and budget.

Fred..

[Red Lightning]

Thanks. I'm planning to switch to SynBlend on my Talon since I race it once a while. What are some standards that indicate a higher quality synthetic (blend) oil?

[PalmerWMD]

Meets ACAE A3 (better than A1 better than A5)

Even A1 is better than your run of the mill stuff

Fred..