On a new car, I change at 750, then again at 3000, and after that I do my regular once per year or 25,000 miles, whichever comes first, as stated on Amsoil Signature. I've been using this oil for decades in cars, trucks, and tractors. It's incredibly good oil.
We're big Motul guys around here!
I think the audi service I got this year on my 2015 was helix 5w 40. Need to check
my receipts when I get in from work
Mobil 1 15w-50
M1 fs 0w40 has been working well for me. But this oil does lose some of its viscosity after a couple track days.
I buy mobile1 high mileage 20k mile oil and change it every year (less than 5k miles per year on my G coupe)
Mobil1 0W-30 full synthetic. Just did my first 1000-mile oil change a couple hundred miles ago. Been using Mobil1 0W-40 on my 2011 WRX for 220k miles, tracked, autocrossed, and daily driver duty after 160k miles when I had a head gasket failure and I rebuilt the engine.
Imo Mobil 1 is mid grade at best. Liqui-moly is the only thing I’ve used for the last 5 years, I too started with Mobil 1, then switched to liquimoly (same weight) and the engine was immediately quieter, smoother, and ran cooler.
If changing oil at 15k kms interval has served you well for 2 lakh kilometers, then I'd recommend sticking to it instead of switching to an oil with long service life. 30k kms oil change interval claim is a big stretch. I've used LiquiMoly 5w-40 with my Polo 1.2L TDI. Drove it close to or may be more than 20k kms over the course of 3 years until the check engine light came on. Immediately changed to OEM engine oil and for some reason the check engine light went away. Except with LiquiMoly, I've always changed engine oil at 15k kms or 1 year whichever was earlier. This is what my car's manufacturer recommends and I'll follow it even if I use LiquiMoly again.
Mechanic put in mobil1 FS 0w-40. Car went into limp mode exactly at end of trip. engine was running rough and would not go above 40mph. Engine light was on. MB dealership denied warranty for an exhaust issue, stating the Mobil 1 oil (mb229.5) did not meet their required specification (mb229.51).
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