Quote:
Originally Posted by Blue By You
Quote:
Originally Posted by edycol
In any lower 48 5W is ok.
I started my 35d with 5W40 oil at -40 here in CO.
X-Cesss GEN2 is more than sufficient.
X-Max is nothing special. Boths Castrol 0W40 and Mobil1 0W40 are better.
Reason is correlation of KV100 and HTHS.
X-Max is 13.5cst and HTHS 3.64cp.
Castrol is 13.1 but HTHS is 3.7.
Mobil1 is 12.9 and 3.6.
Lower KV100 and higher HTHS indicate better base stocks.
X-Max is mostly Group III oil. Both Castrol and Mobil1 are step up from X-Max.
Now, take this into consideration. Lower KV100 will perform better during warm up phase of an engine. That is why BMW uses FE oils as many owners never warm up oil to operating temperature. So 5W30 LL01 oil is actually better choice for winter than 0W40 unless you are starting vehicle below-30 degrees. Than 0WXX has clear advantages.
IMO, best oil for European vehicles in summer and winter unless tracking vehicle is this Castrol. It is just too expensive to justify advantages over 0W40 which is basically thicker brother.
Castrol - 152B99-6PK 06244 Edge A3/B4 0W-30 Advanced Full Synthetic Motor Oil, 1 Quart, 6 Pack https://www.amazon.com/dp/B007G7PUMS...UTF8&psc=1 |
Now you through THIS into the mix! You recommend this Castrol over the Xcess gen2 in both winter and summer? Even tuned?
I'm not concerned about the price of any oil, figure it's the least I can do for my rig. I just want the best. |
If you are not tracking your car, Castrol 0W30 is all you need.
Remember: as thin as possible, as thick as necessary!
0W30 will create bit less heat than 0W40 (two comparable Castrol's). This 0W30 (in Europe originally called SLX) was initial fill on Audi S4 and RS4. HTHS of 3.58 but KV100 11.6. You can't get better than that.
What matters in your tuned engine is oil temperature! That is it. What temperature you are running?