Age old Question/Argument

[Tex_E30]

SO the question is....

Who uses what oil Brand and Viscosity?

Seems to be a lot of Im right your wrong regarding something so simple.

[dnguyen1963]

Why do you bring an old and beaten topic back from its death?

[digger]

10w-50 summer up to 43c ambient oil temp up to 105c
10w-40 winter down to 0c ambient oil temp up to 85c

Gives good pressures, could use a better viscosity for cold weather 10w-40 still a bit thick on cold mornings

Problem with oil companies they dont give data at 0c normally only 40c and 100c

The viscosity you need is strongly dependent on the oil temps

[packratbimmer]

Mobile One bad

Castrol good

[shoshottz]

[emoji1540][emoji1540] justify your statement sirpackrat!?


shottz.

[packratbimmer]

34 years of experience

All of the Castrol engines have stayed clean and not worn out

Mobil One engines turn black or worse, foul up lifters...trash

[noid]

15w40 rotella T diesel oil

[packratbimmer]

MMMM - zinc and phosphorus

[supermansocks95]

+1 on the Castrol
20w50 synth blend(working up to full) in the summers

rotella 15w40 in the winters

[shoshottz]

hmmm...

well i live in TEXAS & its literally 104 right now ive been using mobil 1 10w30...and was thinking about upgrading to the extended performance, any idea on which castrol full synthetic would be the equivalent to mobil 1? edge? @packratbimmer


shottz.

[shoshottz]

thanks for the insight btw.


shottz.

[packratbimmer]

Depends on how much money you want to spend. The most important consideration is that there are enough additives in the oil to protect your cam/rockers.

I used the following study before switching to Cummins/Valvoline Premium Blue 15w 40 purchased at tractor Supply for $15 a jug (its just one gallon though):

http://www.turbodieselregister.com/TDR57_Oil.pdf

So far so good as far as I can see, but I am not sure what I will switch to for the cold long Maine winter. A couple of years ago, it barely got above freezing the entire month of February.

From what I have read (and I am not an expert), the catalytic converter construction and placement will allow use of oil with higher additive levels such as diesel oil.

Good news for you is that the winter oil issue should not be an issue.

[Northern]

M20?
Castrol GTX
10w40 winter
20w50 summer
refer to your manual for what ambient temp/oil

Turbo, sure go synthetic. Otherwise, waste your money at your own discretion.

[packratbimmer]

I have always been a fan of Castrol GTX as well but there is a little controversy over the zddp content on the newer formulas (amazing experience with Castrol GT back in the day too).

Just to be safe, I would consider an additive for the M20 if I used GTX.

[digger]

why not buy an oil that doesnt need an additive?