Castrol Syntec 5W-30, because of this: [https://my350z.com/forum/engine-and-drivetrain/258663-vq-oil-analysis-and-info.html](https://my350z.com/forum/engine-and-drivetrain/258663-vq-oil-analysis-and-info.html)
Between it and the Castrol Syntec 0W-30 it has less wear indicators in the oil than any other brand, at any other weight.
Redline and motul are the best but I’ve been running catrol for 50k+.
With the redline, my car barely burns any oil, and significantly less is directed to my catch can. Night and day difference.
As far as the castrol goes I bought a used 2018 Kia soul that had a slight knock in the engine for ultra cheap and I was able to make that sound go completely away once I switched to Castrol edge. My vehicle also seamed to burn a lot less oil.
Redline is what I'm currently using for engine oil, shock fluid, and brake fluid.
Jeez I feel like an outcast. I run Castrol 20-50 lol but the car loves it
I might switch to liquimoly like a lot of ppl do but I’ve always stuck with the Castrol edge 5w-40, changing around 5k
I been using castrol 5w40 since I got the car new at 82 miles no issues. Sent my oil samples to blackstone for analysis and oil is really good even at 10k.
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 run 5w40 syntec and I eat about 1/2-3/4 oil every 5,000 miles. It will eat it more if I drive it really hard.
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