Engine oil Mobil or OEM Subaru
I used to do Motorcraft 5w20 but I ended up switching to Mobil 1. It just performed better in the car and made the engine run smoother and quieter.
Our engines were originally designed for 5W30, so that's what I use. Namely Mobil 1 High Mileage.
I have a 22 Tiguan and did the first oil change myself around 5K miles. This is what I ended up using. I found it locally so that was a plus, Mobil 1™ ESP X2 0W-20 .
Been using Mobil 1 for over 20 years. Never had any issues.
Mobil1. I use 10w30 in the Texas summer heat and 5w30 in the winter. 2006 c280 with 185k
Mobil 1 extended oil. Full synthetic 5W30 changed every 12,000km. Mine burns about 1 litre (pint) per every 1,500-2,000km. So I top up a few times between full on oil changes
I use Mobil 1 full synthetic because I also use it for my car, and if you send you oil off to a lab after you change it, even at 3000 miles the oil was still in great shape.
Ran Mobil 1 Advanced Fuel Economy for a while and it was fine, but lately I've switched over to the Toyota branded. It's more expensive, but I only change my oil once a year because I don't drive it much, and I like the higher molybdenum content in the Toyota stuff.
The OE VW oil is Mobil 1 0W-20 ESP X2 with a zirconium marker and blue dye added for VW 508/509 requirements. The ESP X2 0W-20 is the only M1 product that meets the higher HTHS spec needed for VW 508/509. Its also API SP and has balanced chemistry for LSPI issues in other makes.
I usend to run syn 15w50 in my tired old vr6 all year round, it helped with seeping issues, lifter noise and all if that. but the oil pressure would be through the roof during first start. so I'd set aside a few mins in the morning to let the car idle, relax, listen to a song and let it get some heat in it. on a normal day, the star up pressure would be .5 bar past the filter bypass (10 bar), warm idle was 2 and a bit, and everything above 3.5k was back to the bypass.
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