I’ve moved to Castrol edge for my 9th gen.
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Ultra premium is the best oil after amsoil, but amsoil is too expensive for this car, pennzoil is the best and cheap
Pros: best and cheap
Cons: amsoil is too expensive
Castrol edge and OEM filter for turbo.
Cons: blend formula
Vehicle:
Mazda 3
Regarding brands, if you want to stick with factory oil without dealer price, Idemitsu is the brand to get. I emailed Mazda corporate and they said Idemitsu is the OEM for their oil.
Pros: OEM for Mazda oil
Vehicle:
Mazda 3
I was a diehard Mobil 1 Extended Protection guy, but fell into the hype about Valvoline Restore & Protect. Tried it on my 2015 Mazda6 2.5 with 95k miles and have to say I'm impressed. I bought it used, it was using about a quart every 3k maybe, and had some blowby. Otherwise ran good, had several 40+ mpg tanks.
Switched to R&P, after 1k the blowby went away and after 3k it looks like it stopped burning oil.
Pros: blowby went away, stopped burning oil
Cons: using quart every 3k
Vehicle:
Mazda
Mileage: 95000 km
After almost 2 weeks of usage, grabe as in grabeeee. napakasmooooth! hahaha tuwang tuwa ako kada throttle kasi mararamdaman mo talaga yung pagkatahimik+ smoothness + responsive throttle nya kaya ang laki ng tinipid sa gas. Kumbaga yung hinahanap ko na smoothnes ng takbo is dito ko nafeel when I start using this kind of oil. From 39 km/l naging 41.3 km/l na sya.
Pros: napakasmooth, responsive throttle
Vehicle:
Honda
They sell Subaru branded Idemitsu at the parts counter
Vehicle:
Subaru
I’m personally a big fan of shell rotella. That’s what I’ve always ran and haven’t had any issues. My 05 STI is at 163k miles still running strong
Pros: running strong, no issues
Vehicle:
Subaru
Mileage: 163000 km
I found Mobil 1 0W-40 to allow a lot more timing chain and lifter noise, especially at startup but even after, then switched to Castrol Edge 5W-40 and the noise suddenly wasn't there. I've used it ever since.
Pros: noise reduced with Castrol
Cons: more timing chain noise
It is an oil from one of the lowest ranges of Castrol.
It is a 100% mineral oil, which is not good and therefore, in addition to greasing, cleaning and cooling less, it has a much shorter useful life, it needs more frequent changes, it is an oil how little/nothing is worth it for a motorcycle whatever it is.
Cons: shorter useful life
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