I have a previous changes' sample in a blackstone bottle... would I be okay dumping that sample and getting a new sample in the same bottle this change? Or would it skew the readings?
What I'd like to do is get a sample this change, switch to Havoline 5w30 for 2 changes and then get another sample to see how my truck does on both oils... any comments? Thanks ![[Cheers!]](/forums/graemlins/cheers.gif)
