Will Car Oil Ruin Your Motorcycle Engine? | The Shop Manual

20% Off Your First Purchase! Click to save this Holiday season! Thanks to Kershaw Knives for sponsoring this episode of The Shop Manual. Kershaw is giving away free pocket knives and offering viewers a discount on all purchases. Woohoo! Go to to enter the monthly giveaway for a free pocket knife, and get 25% off your order at with code TSM25. Will Car Oil Ruin Your Motorcycle Engine? | The Shop Manual Cynics say the only difference between motorcycle oil and automotive oil is the marketing on the bottle. What are the distinctions, and more importantly, can using auto oil in your bike damage the engine? Motul 7100 oil: Mobil 1 oil: Castrol Power 1 oil: Motorex Top Speed oil: Bel-Ray EXP oil: Maxima SynBlend oil: LiquiMoly 4T Street oil: