vs
Engine oil PENNZOIL or IDEMITSU
Pennzoil Ultra Platinum in my 2016 Focus ST. It seems to love it. Quieter idle, great gas mileage, drives smoother after a cold start.
Pros: quieter idle, great mileage
Vehicle:
Ford Focus
Idemitsu is responsible for the oil that powered the Mazda 787b; they know the rotary like no other. I exclusively use their synthetic 20w50 and premix.
Pros: knows rotary like no other
Grab a good quality 0/w20 synthetic. I'm currently using Pennzoil and a Fram filter.
Pros: good quality synthetic
Vehicle:
Mazda 3
Mileage: 120000 km
I run Pennzoil ultra platinum oil and GM syncromesh trans fluid
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
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've been using penzoil platinum
Vehicle:
Subaru Forester
I’ve used nothing but Pennzoil Platinum since the free oil changes ran out, 150k or so now, and never had a problem.
Pros: never had a problem
Mileage: 150000 km
I prefer ultra platinum over mobil 1 since ultra is used with a group 3+ base oil, which has better heat handling than regular group 3 oil.
Pros: better heat handling
I used Valvoline synthetic in my first SHO, and I am using Mobile 1 in my latest SHO. I tried Pennzoil in my 5.0 (Windsor) and all the lifters started clattering.
Cons: lifters started clattering
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