Engine oil Mobil or Castrol

Not sure if my opinion matters, but I use the Toyota version of the Mobil1 0W-16. Runs great.

Using Castrol EDGE Euro 5W-40 after watching a EN owner on YouTube suggested it. Car runs great in this 110 plus days in Texas

I did 100k on Castrol gtx in an f4i plus tens of thousands on other bikes using the same oil. I buy it in bulk and it goes in the whole fleet.

Change the oil again and use Mobil 1 full synthetic and make sure it says V-TWIN on the label.

In the rare occasions I get it from there, I use Castrol or Mobil One 5W-30 or 40.

I’ve been using Mobile 1 since I’ve purchased my RAV4-brand new. Now at 160xxx miles with no oil burn. Runs like the day I bought it

Walmart carries jugs of Castrol Edge SPT 0w40 A3/B4 for much less than quarts at AutoZone

Run it in my R, wife's GTI, and even ran it in a WRX I used to have. It's good oil, the analyses I've sent in over the years don't lie!

Castrol Edge 5W-30 for me. I live in Vegas where it barely gets under 30 degrees in winter even so it's a better oil for the hot climate in live in

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.

I ran M-1 15w50 for 10k miles or so, and my car ran 10 degrees hotter on average than with any other oil I've used. Throttle response also felt sluggish.