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.

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.

Grab a good quality 0/w20 synthetic. I'm currently using Pennzoil and a Fram filter.

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

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.

I've been using penzoil platinum

I’ve used nothing but Pennzoil Platinum since the free oil changes ran out, 150k or so now, and never had a problem.

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.

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.