djspawn00 Posted October 30, 2006 Share Posted October 30, 2006 I went to get an oil change today at a nearby Monro service station. I requested 5w-30, but instead got 5w-20. Is there a big difference? The manager insisted that it would not have an adverse affect. I was running late and did not have any time to argue. Should I do anything or is the 5w-20 ok for my 02 gs300 with 48k miles. I appreciate all the feedback, thanks in advance. Quote Link to comment Share on other sites More sharing options...
Toysrme Posted November 4, 2006 Share Posted November 4, 2006 Yes, it would have an adverse affect on alot of engines. So go back & break his nose. In your case, the JZ blocks were cleared for use with 5w-20 so you should be fine aslong as you change it out on schedule. I would definately change it on schedule. Places like that use junk for oil. Quote Link to comment Share on other sites More sharing options...
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