Engine oil Castrol or Shell
I live in a dusty climate I change my oil at least annually and I use Mobil one in my Volvo, Kirkland synthetic in the kids cars, and rotella in my air cooled vw.
I use Rotella T6 5W40 on my stock motor STI.
I'm a Castrol syntec guy and I like Kirkland oil. So that's what my cars get.
I'm personally running Castrol in the BMW bottle.
Got some numbers for the oil pressure Water temp around 90-95C/194F. Ambient temp 28C/82F Oil 5W30 Castrol Edge LL Hot idle 20 PSI 2000RPM 60 PSI 3-5000RPM 70 PSI Looks okay?
My co workers wife had a high mileage Sienna 3.0. Oil leaking from every seal. We started using Castrol high mileage, it stopped leaving spots in his driveway and quit loosing 1.5 qrts between oil changes.
now im using shell long ride currently at 1500km and i havent feel any vibration yet and its cheaper than amsoil.
I have stuck with manufacturers till manufacturers recommendation is causing issue, like my gixxer leaked entire oil from companies estar engine oil, switched to castrol power 1, no leak, headache gone and happy riding on it for about a decade now.
I've tried most of them. I went like 2 years doing all sorts of testing on my car and never noticed a difference. I stick with good old Castrol Edge like the factory recommends.
I switched to Rotella T6 (5w-40 Full Synth) after running Penzoil, Chevron, Castrol, Mobil, regular non-high mileage 10w-30 dinos in that order over 4000 miles. Worst of this bunch was Mobil and Chevron, the HLA tick was unbearable, even right after the oil change.
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