This Saturday Q&A hits three questions that can make or break your engine - and your wallet.

Margaret asks how long fuel can be stored for small engines like mowers. We break down ethanol problems, fuel degradation, and how using a proper fuel stabilizer can extend life and prevent costly issues.

Dawn wants to know how to tell if a thermostat is failing - and how often it should be replaced. This turns into a must hear explanation of how critical the thermostat is in protecting your engine from catastrophic overheating, and why cooling system maintenance matters more than most drivers think.

Chris brings up fluids: do they really need to be replaced? We cut through the "lifetime fluid"myth and explain how to test for degradation - or follow a simple 24 - month rule of thumb to protect your vehicle and extend it's life.