msggunny said:
Chris,
All i can say is well done, even if all the info you have posted is ass bleedingly painfull to read. It makes my eyes go cross..
Anyways, I am sure i have asked you this before but i will ask again.
Royal Purple 10 w40 or RP 15 W40?
Right now i am running RP 10w40 in both the D1 and the SIII. No issues with either and they seem to like it. There is a very strong possibility that i will be moving way up north and dealing with real winter for 5-6 months of the year, as well as east coast summers.
What would you reccomend?
I have been thinking about switching to Rottella 15/40 but havent gone that way yet.
Thanks man,
Do you use your oil knowledge before you slip a roofie into a chicks drink or after?
Between Roofies (The wonder drug that works wonders!) and mad oil skillz, the bitches cannot resist ALL THIS!
The latest issue of "Lubricants and greases" showed up, she calls it my new porn.
(YES! There really is such a mag)
Let me give everyone a rule of thumb for Rover V8s.
There is no such thing is "Diesel" oil. There is no spec of "Diesel".
There IS, however oil that is SUITABLE for a diesel. Diesel has higher compression and spring rates, and needs a stronger oil "Cushion" to prevent the lifter from scraping off the oil and contacting the cam. This is where ZDDP came into play. If the lifter scraped the oil away, the lifter would hit the zinc and not the cams steel. Now, because we dont have ZDDP, we need to look for oil that will not scrape away.
The resistance to scraping is measures by a oils High Temp, High Sheer rating..(HTHS).
Oils suitable for diesels, with their higher spring rates SURELY can handle a Gas engines lessor rates. So, what oil is suitable for diesels...One with a HTHS of 3.5.
Does this mean oils with DIESEL on the label meet this? NO! Remember, the term Diesel is not a spec and has no meaning for us.
So, how do we know.
If we can get the Spec sheet, we can check. But, many oil companies will not share this data.
So, what then.... We can fall back to these bullet points...
ALL oils sold in the US with a API rated weight of 15-40 MUST meet a HTHS of at least 3.5. Thus, for a OHV Engine, this would give enoguh resistance to oil scraping.
This weight of this oil may not be practical in cold ambiant temps. Now what?
We know that a ACEA A3/B3 MUST be also at 3.5. So we can resort to that..
If we have a oil that is a 15-40 or A3/B3 we have a oil that has a high enough HTHS to protect our cams.
So, if we cannot confirm a HTHS of 3.5 on a spec sheet, and the oil does not meet acea a3/b3 (Not a1 or a2-must be 3) and the oil is not a 15-40, I woudl not use it in a Ohv engine like A Rover V8.
