Deebo Posted June 18, 2021 Report Share Posted June 18, 2021 Can I use 5W-30 weight engine oil for the LSY engine for better protection?? Quote Link to comment Share on other sites More sharing options...
cdgrinci Posted June 18, 2021 Report Share Posted June 18, 2021 0-20 is your recommended viscosity; this will flow a little better than 5-30 and your engine was designed with 0-20 in mind. Your engine won't detonate using the slightly more viscous oil but if something does go wrong (engine wise) and your dealer determines you used a non-recommended oil, you could void your warranty. Quote Chuck '19 CT6, '04 Bravada........but still lusting for that '69 Z-28 Link to comment Share on other sites More sharing options...
Deebo Posted June 19, 2021 Author Report Share Posted June 19, 2021 14 hours ago, cdgrinci said: 0-20 is your recommended viscosity; this will flow a little better than 5-30 and your engine was designed with 0-20 in mind. Your engine won't detonate using the slightly more viscous oil but if something does go wrong (engine wise) and your dealer determines you used a non-recommended oil, you could void your warranty. but 0W20 oil's HTHS sucks, for a turbo engine Quote Link to comment Share on other sites More sharing options...
cdgrinci Posted June 19, 2021 Report Share Posted June 19, 2021 (edited) Here's a link that might help: It's over my head but might be what you're looking for. What is HTHS ? | Bob Is The Oil Guy Edited June 19, 2021 by cdgrinci Quote Chuck '19 CT6, '04 Bravada........but still lusting for that '69 Z-28 Link to comment Share on other sites More sharing options...
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