For the last 30k km I'm running on Mobil1 5W50, Rally formula.
I've chosen it because of the high mileage of the car (180k km) and it's supposed to have better heat resistance.
Are you sure this is okay for your car?
I'm looking into track spec oils for my car just now.
The company I've been using for 100,000 miles is Millers oils. These guys have beeen providing me with a fantastic service and great advice.
I'm currently looking into oils that will take between 130 and 150 Degrees C as this is what will be seen on the track.
The best oil they do for this would be excellent apart from the fact that it will eat my CAT.
I find the man on the forums advise on oils not worth listening to TBH.
Unless he works for an engine oil manufacturer what do they really know about the oil.
Price, weight and spec, anything more than that is guess work on there behalf.
How do you know the oil is working well for your engine and your driving style?
Do you have it analysed after use to see if it was past its best?
I have, and I know 5w-30 Millers XF long life with my sort of driving is good for 15,000 miles +.
This time I change I will have done 10,000 miles with three track days and 1 1/4 mile day, that'll put it to the test, lol