Engine oil Castrol or ELF

but real talk: Castrol GTX Synthetic 10w40 in Tennessee summers and 5w40 in winter.

5W30 Castrol edge full synthetic

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+.

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.

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.

That's what the dealer and I use. Castrol 5W40

If you want to do 5k oil changes, best to switch back to Castrol GTX or any cheapo oil as you'll have no significant advantage using synthetic for short periods of time.