Not sure what oil was previously used in Z28
08-01-2014, 11:59 AM
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Not sure what oil was previously used in Z28 Hi,
Very quick question:
I'm not sure what type of oil (synthetic or conventional) was used previously in my Z28. I recently purchased the vehicle a few months ago and the guy who owned it passed away.
Does it matter if he was using conventional and i switch to synthetic or vice versa?
THANK YOU!
Very quick question:
I'm not sure what type of oil (synthetic or conventional) was used previously in my Z28. I recently purchased the vehicle a few months ago and the guy who owned it passed away.
Does it matter if he was using conventional and i switch to synthetic or vice versa?
THANK YOU!
08-01-2014, 12:35 PM
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It makes no difference. You can switch back and forth with every oil change if you like.
I believe the rumor that you cannot switch back once you have gone to synthetic has to do with how certain synthetics were made many, many years (decades) ago. This doesn't apply to modern, off-the-shelf synthetics though.
Feel free to use whatever oil you think is best. There are a ton of threads that discuss favorite oils for the LS1; everyone has an opinion and many of them are different, so it's best to do some research and decide for yourself. My personal choice for LS1s is Mobil 1 0w40.
I believe the rumor that you cannot switch back once you have gone to synthetic has to do with how certain synthetics were made many, many years (decades) ago. This doesn't apply to modern, off-the-shelf synthetics though.
Feel free to use whatever oil you think is best. There are a ton of threads that discuss favorite oils for the LS1; everyone has an opinion and many of them are different, so it's best to do some research and decide for yourself. My personal choice for LS1s is Mobil 1 0w40.
08-01-2014, 02:02 PM
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It makes no difference. You can switch back and forth with every oil change if you like.
I believe the rumor that you cannot switch back once you have gone to synthetic has to do with how certain synthetics were made many, many years (decades) ago. This doesn't apply to modern, off-the-shelf synthetics though.
Feel free to use whatever oil you think is best. There are a ton of threads that discuss favorite oils for the LS1; everyone has an opinion and many of them are different, so it's best to do some research and decide for yourself. My personal choice for LS1s is Mobil 1 0w40.
I believe the rumor that you cannot switch back once you have gone to synthetic has to do with how certain synthetics were made many, many years (decades) ago. This doesn't apply to modern, off-the-shelf synthetics though.
Feel free to use whatever oil you think is best. There are a ton of threads that discuss favorite oils for the LS1; everyone has an opinion and many of them are different, so it's best to do some research and decide for yourself. My personal choice for LS1s is Mobil 1 0w40.
08-01-2014, 04:25 PM
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The owner's manual does in fact call for 5w30, but not all 5w30 oils are created the same. There is a range of oil values that can still be called a w30. UOAs (Used Oil Analysis) have generally shown LS1s to do well with oils that are on the "thick" side of a w30 or the "thin" side of a w40. Brands like Mobil 1 tend to run on the thin side of their grade, thus their 0w40 usually shows great results in most LS1 applications (and in general 0w40 is one of M1's better oils).
The "0" just indicates better flow on cold starts (vs. a 5 or 10).
There is a ton of information on engine oils if you really wanted to research. Sites like bobistheoilguy.com have a wealth of info and plenty of tech tutorials to read through if you are interested.
08-01-2014, 04:56 PM
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Haha, thank you.
The owner's manual does in fact call for 5w30, but not all 5w30 oils are created the same. There is a range of oil values that can still be called a w30. UOAs (Used Oil Analysis) have generally shown LS1s to do well with oils that are on the "thick" side of a w30 or the "thin" side of a w40. Brands like Mobil 1 tend to run on the thin side of their grade, thus their 0w40 usually shows great results in most LS1 applications (and in general 0w40 is one of M1's better oils).
The "0" just indicates better flow on cold starts (vs. a 5 or 10).
There is a ton of information on engine oils if you really wanted to research. Sites like bobistheoilguy.com have a wealth of info and plenty of tech tutorials to read through if you are interested.
The owner's manual does in fact call for 5w30, but not all 5w30 oils are created the same. There is a range of oil values that can still be called a w30. UOAs (Used Oil Analysis) have generally shown LS1s to do well with oils that are on the "thick" side of a w30 or the "thin" side of a w40. Brands like Mobil 1 tend to run on the thin side of their grade, thus their 0w40 usually shows great results in most LS1 applications (and in general 0w40 is one of M1's better oils).
The "0" just indicates better flow on cold starts (vs. a 5 or 10).
There is a ton of information on engine oils if you really wanted to research. Sites like bobistheoilguy.com have a wealth of info and plenty of tech tutorials to read through if you are interested.