We just changed the oil for the first time at 2.5k miles on our '23 Forester Wilderness. There's a night and day difference in cold start engine noise between the factory fill and the Liqui Moly Molygen 0w20 that went back in. The Molygen being significantly more quiet. Not sure if it means...
I'd like to compare the quietness of GTX FS to LM Molygen in our noisy '23 Forester Wilderness. I swear it sounds like it's gonna blow apart during cold starts.
Here's Castrol's response regarding GTX FS and Magnatec:
"In the USA, Castrol GTX MAGNATEC has been replaced by Castrol GTX Full Synthetic to align with GM’s latest generation of GM-certified engine oil, GM dexos1 Gen 3.
Castrol GTX Full Synthetic and Castrol GTX MAGNATEC are very similar...
Our new 2023 Forester Wilderness has just about 2k miles on it and I've begun to think about it's first oil change. I've already decided to do 5k OCIs (Subaru says 6k) like I did with the 2008 Mazda CX-9 (Mazda said 7.5k) it replaced. On that car I always used Fram Ultras so my first thought was...