Engine oil Mobil or IDEMITSU

Mobil1

Owner of an often abused 250k+ mile 2002 Outback here. I use Mobil1 full synthetic 5W20. Runs like a top.

Porsche wanted you to use 0W-40 originally but now they recommend 5W-50 which is what Porsche sell for the 996 as their Classic oil for the 996. I’ve used Mobil 1 5W-50 for 3 years now, good pressure and next to nothing on the magnetic drain plug since so seems to be working. In my last change I’ve also added Ceratec on recommendation of another member of this sub and since have noticed the engine is a little quieter and get slightly better mpg so would recommend giving that a go if you are so inclined.

Idemitsu all day. It’s synthetic but what needs to be emphasized is the ingredient blend is purpose designed for a rotary to make the right lube + burn.

I use Mobil1 0w40 for the last 3 years (changed twice a year) with flawless UOA reports. I upgraded this summer to M1 5w50 as I do get low pressure warnings at times during high heat and heavy traffic situations summertime. Winter going back to 0w40

I've been running that exact oil in my rx8 for about 1k km now and its still as smooth as ever

In my VN, always Mobil 1 0w-30 AFE.

I vaguely remember a video or a study done on mobile? Syntec or something, a somewhat scientific study pulling samples every 1k miles and sending out to a lab. Bottom line was that the oil actually got better over miles and they abandoned the project at 15k miles.

I typically use whatever is cheapest and proven oils for all my cars. I have an '08 2.5 and have been using T6 5w40, they typically run coupons for them for $20 or 25.00 for the gallon jug. No, it doesn't get VW's official stamp of approval but it seems to do pretty well in this application and seems quite popular amongst various other makes especially Euro cars that require a 40wt oil. Quite honestly, I'm pretty sure you can run a quality 5W30 in this motor, it is not anything special. I've run M1 0W-40 and although it has the VW spec labeled on it, my car always had a faint tick coming from the valve cover area (lifter?) when warm. It never did this with the T6 oil in it.

Mobil one didnt go well with me as i was burning oil really fast it and my engine wasn't feeling it I tend to use different brands also as i recently tried royal purple