Royal Purple. Engine Damage In The Long Term?

Unclemeaty · 02-02-2011, 09:11 AM

Quote:

Rotella seems to be just about universally accepted as a high grade oil, my concern with using it in a car is how thick it is. Especially in the Z which for a special super thin oil.

Rotella is good indeed... but I think I remember now why I stopped using it - because there are not too many viscosities available. I think the thinnest Rotella gets is 5w40 which is likely no good for our cold cars. Perhaps in Florida it would be fine.

xsnapshot · 02-02-2011, 11:45 PM

Quote:

Originally Posted by Unclemeaty

What about Rotella T Synthetic? I used to run that in all my cars when I found out about it. The price is decent (Walmart) and its mainly designed to be cleaner for use in Diesel trucks. Lots of tq and boost out of those engines...

I have not used it in years, for no good reason though.

A great oil! Very tough, and meets just about every specification possible for auto manufacturers. I run it in my WRX. High specific output engines love this oil.

Quote:

Originally Posted by Unclemeaty

Rotella is good indeed... but I think I remember now why I stopped using it - because there are not too many viscosities available. I think the thinnest Rotella gets is 5w40 which is likely no good for our cold cars. Perhaps in Florida it would be fine.

Negative. In oils, the "x" in xw-y, is the weight of the oil when cold. There is some variation in this category, but for the most part, a 5w-30 oil is as thick when cold as a 5w-40. If your talking about viscosity when hot, then yes, the 5w-40 will be a bit thicker than the 5w-30.

crash1369 · 02-03-2011, 05:51 AM

Quote:

Originally Posted by xsnapshot

A great oil! Very tough, and meets just about every specification possible for auto manufacturers. I run it in my WRX. High specific output engines love this oil.

Negative. In oils, the "x" in xw-y, is the weight of the oil when cold. There is some variation in this category, but for the most part, a 5w-30 oil is as thick when cold as a 5w-40. If your talking about viscosity when hot, then yes, the 5w-40 will be a bit thicker than the 5w-30.

On the contrary isn't Rotella one of the oils that specifically does Not meet the new standards calling for less zinc in the oil to meet reduced emissions regulations.

That is of course why people like it since the zinc is what protects your motor, but it's also supposedly rotting out your cat's and killing us all

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