Join Date: Apr 2016
Location: SE Pa
Car Year: 2016
Car Model: Forester 2.5i Tourin
Feedback Score: 0 reviews
In the US, the Magnuson–Moss Warranty Act allows you to use whatever brand of oil you want. However, you need to use an oil that fits within the guidelines of the manufactures requirement if you expect the warranty agreement to remain effective., which most major oil brands do.... All you need to do is read the manual, then see if the oil itself fits within the guidelines, pretty simple.
If Subaru were to say you MUST use their branded oil, they have to supply it. They can recommend a certain brand. Some dealers will try to avoid this 1975 legislation language.
Having written warranty claims for nearly 30 years I'm very familiar with how this works.
I use Mobil One at times, big user of Pennzoil Platinum and some Quaker State full synthetic. I always use the weight specified while under warranty. Once the warranty is over, I do at times stray a bit depending on the time of year.
You will get 20 opinions if asking 20 people. I'm simply posting what the law and what warranty agreements allow.
Remember, a warranty is an agreement. You step out side of those parameters, the manufacture can say no warranty. Yet people do it all the time. Usually they'll get away with it. But I've seen some that haven't. Then they whine about the piece of junk they bought, which is total nonsense.
Put yourself in their position. Let's say you have the knowledge or think you do to make a product. You or your engineers suggest certain things need to be done for a warranty agreement. If someone went out of those parameters, would you pay for a failure? I know what that answer is even if they won't admit it.
Like the guy that recently posted about an engine failure at 45K miles but changed oil every 15K. GEZ.
Facts are facts.