Red Line products go in all my cars. AMSoil and Motul also quite good.
I use redline hp 5w30 for my n54. 7500 mi intervals. I’m at 113k miles currently. At about 90k I send my oil off to blackstone for an oil analysis. Came back in very good shape and they indicated I could easily go to a 10k mi interval.
I use redline high performance 5w30 and I don’t burn a drop of oil even with 7500 mile intervals on my n54 powered 335is…With bmw synthetic my car would burn about a quart at 7500 miles.
I use Red Line in everything. The M3 gets 15w-50.
With the redline, my car barely burns any oil, and significantly less is directed to my catch can. Night and day difference.
Redline is what I'm currently using for engine oil, shock fluid, and brake fluid.
Redline 5w-40. 6k mile intervals. Probably much nicer than what my little GTI needs, but I like supporting local businesses and it's amazing oil.
I use strictly Redline oils for all my fluids except premix. Engine oil is Redline 10w40.
Redline recommended 10w-40 Full Synthetic for my 1.8 solid lifter JH turbo application and the tech guy suggested modern synthetics don't cause seal leakage (like OG synths of 25 years ago) and holds up way better than the 40w rating in hot temps and protects much better when cold than even the current crop of Castrol 20/50 dino oil I was running. I swapped over the M81 to the same Redline oil and have not yet noticed any new oil leaks yet.
I use only Redline for all my oils-fluids. For engine oil, I have used 10w40 consistently.
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