Qs euro 5w40

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Oct 24, 2023
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Hey guys. Just put some Quaker state 5w40 euro in my 94 ls400. I switched from 5w30 just because I wanted to and I run my engine hard, and it’s okay for my application. I was comfy running 6k oci with regular qs full syn. Anyone know how long you can run this euro formula for? I don’t know much about euro formulas. City driving. Thanks
 
QS Euro 5W-40 is good oil. If you run it hard, and mostly city driving - stay at 6k OCI.
I personally still run 5k OCI normally, or 3k OCI in severe service. That's always with store bought synthetics, and some HDEO semi-synthetics.
 
Hey guys. Just put some Quaker state 5w40 euro in my 94 ls400. I switched from 5w30 just because I wanted to and I run my engine hard, and it’s okay for my application. I was comfy running 6k oci with regular qs full syn. Anyone know how long you can run this euro formula for? I don’t know much about euro formulas. City driving. Thanks
~10k miles/1 yr which ever comes first. This is the OCI for the majority of the euro approvals on the bottle. You're paying for time in the sump.
 
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