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C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old May 17, 2013 | 03:22 PM
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I may have put 5w20 into my 1994 LT1...Do I need to get it out and put in the 5w30 its supposed to use????
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Old May 17, 2013 | 08:05 PM
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You will probably be fine, just keep an eye on oil pressure. if it gets lower than normal you may want to.
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Old May 17, 2013 | 09:22 PM
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Even though 5w-20 isn't the correct spec, it is not going to ruin your engine.

I wouldn't use it all the time or long term, but its not an emergency that you get it out either.
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Old May 17, 2013 | 09:25 PM
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After lots of reading on a motor oil forum, i run it in my '86L. No problems in 2 years and
lots of 1/8 mile passes.
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Old May 18, 2013 | 07:37 AM
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I agree it won't ruin your engine, but since we are going into summer months I would change it to the right oil. In winter months I would say let it stay in....WW
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Old May 18, 2013 | 08:19 AM
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Old Jul 22, 2021 | 11:15 PM
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Originally Posted by bobmac6
I may have put 5w20 into my 1994 LT1...Do I need to get it out and put in the 5w30 its supposed to use????
What are your cold pressures at idle and high revs and your hot pressures at idle and high revs
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Old Jul 22, 2021 | 11:26 PM
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Originally Posted by douglasjre
What are your cold pressures at idle and high revs and your hot pressures at idle and high revs
Last posted in way back in May of 2013 so my money is on the oil being changed and the incident forgotten. 05-18-2013, 07:19 AM
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