I noticed a massive difference switching from 0w-30 to Mobil 1 FS 5w-40 in my NG 93. Engine sounded better, burned WAY less oil, and no noticeable fuel economy or power difference. I also used Ceratec a few times and that made it feel smoother.
Ran quieter on 5-40 heavy duty diesel Mobil 1
Felt more powerful, but that may have been a perception from quieter and smoother power. Others on Saabnet reported the same.
If you're oil change is specified for longer, buy Mobil 1 in the correct spec grade and change it then, you will save money and use less, which will keep your cash in your pocket not the oil industry's.
I go for Castrol for BMW. Somehow this machine really likes it.
I’ve been using castrol edge euro 0w-40 for years and loved it. Seems to be discontinued, can’t find it anymore. That sucks, moving to mobil 1 euro 0w-40.
I run Castrol Power 1 in my KTM 350 4T. I'm just past 800 hrs with \~25hr oil changes. It meets the JASO specs my bike requires. I have not changed a clutch ever since I bought it at 280 hrs. I had the motor apart at 500hrs and the Nicasil bore coating was \*perfect\*. That was the last time I swapped out the piston.
Make sure to use dexos GM approved oil or that thing will start making weird noises. I’ve only used Mobil 1 and not had any issues. Stay away from the cheapest stuff. You might regret it later.
5W40 Castrol
I wouldn't consider M1 4T to be the highest quality oil. It's a pretty standard Group III/IV synth blend with a motorcycle on the label.
If you run Mobil1, yes you will needs lots of extra oil... Mobil 1 doesn’t make the grade.
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