Some exhaust smoke can be harmless, while others can signal trouble for your vehicle. If your car, truck, or RV is blowing out abnormally colored smoke, like blue, then you should have a professional check it out. Usually, blue exhaust smoke can be accompanied by other troubling symptoms. Your diesel truck might have trouble starting up or take longer to crank. So what does it all mean? What Does Blue Smoke Indicate? Blue smoke means engine oil has mixed in with your gas in the combustion process, and the motor oil is being burned and sent out your exhaust pipe with the rest of the engine's byproducts. This not only means that your motor is running inefficiently, but it means that you have an oil leak that needs to be diagnosed and patched up. You should get an inspection before damages start to spread. 4 Instances That Can Cause Blue Exhaust Smoke Oil Mixing with Fuel - Dry and cracked valve seals are no longer sufficient to keep your vehicle's fluids separated. As a resu ... read more