Castrol during my warranty period and Costco after.
For my 2.5L NA, I may keep using Mazda moly 0W-20 oil made by Idemitsu until it’s no longer available or getting too expensive. Then I’ll change to a newer GF-6 oil mainly for claimed much better timing chain wear protection.Which one would you choose?
Although it’s a conventional oil, Castrol GTX has been serving my vehicles very well too. I have been using Castrol GTX on my 1998 Honda CR-V and all previous VW’s. Now at ~185,000 miles I still use Castrol GTX 5W-30 on the CR-V and it burns at most 0.5 quart of oil between oil changes.I've been using Castrol GTX since I started driving and it's treated me great. No oil quality issues in any of my cars ever. Plus rotary engines burn oil as part of the combustion and GTX leaves no ash or carbon deposits.
Of the two in the poll though, I don't think it matters much because Idemitsu and Shell merged back in 2016. Believe it or not, Idemitsu bought out Shell, not the other way around.
correct.....
I was surprised to hear Idemitsu bought Shell, but must be only the small motor oil division of the Shell, can’t be the entire Shell Corporation.
If Mobil1 stops doing their rebates, I’ll likely go back to Amsoil for extended OCIsamsoil