Hello, I have been a lurker on this site for some time now, I have to say it is extremely informative! Lots of very knowledgable people here! I recently purchased a 1991 Honda CRX Si to use as a commuter car back and forth to work. I do not know what type/weight oil the previous owner used. I changed the oil recently, I put in Valvoline MaxLife 10w-30, and it seems fine. However I am a bit partial to Amsoil (I use it in my other 2 vehicles) and would ideally like to switch to it. Do you guys recommend this? The car has 167k miles and does not consume oil as far as I can tell (no smoke etc) however the oil pan gasket does have "seep" that is very slow. I am just concerned the synth will increase the "seep". Also there is a bit of varnish on the dipstick, I have not pulled the valvecover but I would imagine the engine is in similar shape. If I do switch, should I go full synth on the Amsoil, or I understand they have a blend available? I did not see it on their website. Any feedback would be appreciated!