Many dealers use Castrol LL03 5W-30 and it makes a huge difference in MPG. I ran it for 7500 miles and had the oil tested.
I ran Edge 5w-30 in my APR 2.0 TSI last winter, had the used oil tested at CAT afterwards for $13, and it did a great job.
When I dumped my dealer Syntec 5w-40 for M1 0w-30 in Dec, it was night-and-day. Way lighter and better.
Just changed my oil in my '02 Camaro. It has the LS1 and just rolled over 150,000 miles. I use Mobil 1: 5w-30. It hasn't seen anything other than Mobil 1 so that's what I use haha.
Castrol Syntech or Mobil One in 5w30 for the Volvo and 10w30 for the Ford. Mainly because I'm a lazy bastard that hates doing oil changes and the stuff lasts twice as long as regular oil. That, and I've had cars run over 400k using them exclusively.
Mobil 1 extended performance 5w-30. I don't drive many miles and I want the extra life of the oil in months. Plus Mobil 1 is factory fill on my LS2.
Castrol edge 5w30 in my Focus
I ran Mobil 1 or German Castrol synth in my BMW (inline 6), and run Castrol GTX in my v8 truck.
Castrol Edge. My car is very specific about what grade the oil has to be and this seems to be the only one that matches OEM oil.
I :heart: M1 0w-40
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