“Hi,
My 50-year-old TR6 engine was rebuilt 12 years ago. I always used Mobil 1 0W40 after rebuild. For the last 5 years, I have used TQX FS 5W40—the same protection at a fraction of the cost. Change between 4K & 6K & analysis is always good. Recommended for any car that needs A3B4 oil or API SE to SP whatever the year.”