I've also asked this question on the Spanner Day Thread, but just thought I might get more responses in here. Just wondering, as I'm trying to clean out the air filter on my ZXR250. The manual says get engine oil with SAE30. I assume it's okay to use motor oil (for cars) when it's years old? I was going to use the one that I spotted in the carport, dad prolly had it but didn't use it (it's unopened.) I noticed that the batch was made in March '03. Is there going to be a problem with that?