Been using the Motul 7100 4t.. My 390 is flawless till now even after 38k kms.
we run castrol edge in our ‘04 FXT.
Have been using Motul 5w30 for many years now...
My rotary expert in north Texas recommended that I use 10-30 conventional oil. I personally prefer Castrol GTX
I use Castrol Synthetic 10w-30 on mine.
It’s thicker oil, so I feel like it gives the engine better protection. With 272k miles on it, I figured why not.
I’ve been running Castrol GTX 10w30 conventional in my 9000 Aero. Brought it to a Saab specialist and he recommended it. Need to have the valve seals redone and the oil is thick enough that it doesn’t get past the seals and no smoke. No issues running it. I change it every 3 months regardless of how far I’ve driven.
Good results with Castrol Edge Euro full synthetic. No issues. 138,000 miles, no oil consumption or smoke.
Dt 40… also use motul xcess gen 2 in the 986, the cayenne and a couple of bimmers. Blackstone reports look g great with all of them.
I ran Castrol 5W30 full synthetic in the engine.It burned a quart every 3500-4000.
I noticed when the castrol 508 spec wears. It smells Faintly of onions and beans. Strange smell indeed, when I took my car to street side VW out of Amarillo, Texas.
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