Originally Posted By: aquariuscsm
Maybe the tech meant you were using too thin an oil? Like M1 5W30 vs M1 5W40?
I agree Aquariuscsm, the tech may not have used the best words, but maybe he was trying to say that the spec'd M1 5W-30 ILSAC GF-5 oil was too thin.
Two obvious choices are M1 0W-40 and Edge 0W-40.
Originally Posted By: lubricatosaurus
Subaru says to run a full-synthetic 5w-30 or 0w-30, certified API and SN, GF-5, thats all you need to know. Any brand thats certified will be fine
However I would use Castrol Edge 5W-30 A3/B4, this has a HTHS of 3.5 to 3.6
The ILSAC M1 5W-30 has a HTHS of about 3.1
The M1 0W-40 has a HTHS of about 3.8
So the full synthetic Edge 5W-30 A3/B4 is much "thicker" than the M1 5W-30 GF-5.
But it's still a synthetic 5W-30, which given how much they appear to know about oil, might be enough to make everybody happy.
Maybe the tech meant you were using too thin an oil? Like M1 5W30 vs M1 5W40?
I agree Aquariuscsm, the tech may not have used the best words, but maybe he was trying to say that the spec'd M1 5W-30 ILSAC GF-5 oil was too thin.
Two obvious choices are M1 0W-40 and Edge 0W-40.
Originally Posted By: lubricatosaurus
Subaru says to run a full-synthetic 5w-30 or 0w-30, certified API and SN, GF-5, thats all you need to know. Any brand thats certified will be fine
However I would use Castrol Edge 5W-30 A3/B4, this has a HTHS of 3.5 to 3.6
The ILSAC M1 5W-30 has a HTHS of about 3.1
The M1 0W-40 has a HTHS of about 3.8
So the full synthetic Edge 5W-30 A3/B4 is much "thicker" than the M1 5W-30 GF-5.
But it's still a synthetic 5W-30, which given how much they appear to know about oil, might be enough to make everybody happy.
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