Bought my 97 GTX and 2000 RX last winter, both with TC3W oil. Spark plugs were nice and black. I Drained them, filed 97GTX with Sea-Doo mineral oil and 2000 RX with Sea-Doo synthetic oil. After that spark plugs on GTX were still looks good, but on RX with synthetic oil the central electrode is rich and black but the rim - almost clean. Then I change oil on both Jet Ski to AMSOIL "interceptor" Now on both, GTX and RX spark plugs have a dark central electrode but absolutely clean rim, like on a new plug. I tried to add more fuel to the mixture but had the same effect.
Any Ideas? Does in means that with synthetic oil, especially AMSOIL "Interceptor" results of spark plug test is invalid?
Thank you.
Any Ideas? Does in means that with synthetic oil, especially AMSOIL "Interceptor" results of spark plug test is invalid?
Thank you.
Comment