10w30 vs. 10w40 Choosing the Right Oil for Your Engine's Needs

In the 10W-40 engine oil, the 10W (W = winter) simply mean the oil must have certain viscosity or "thickness" flowing at low temperature. The lower the "W" ... What would you expect the Honda rep to say? ;) 10W-40 is perfectly fine and comes in many brands. Difference between 10W40 and 10W30!! HUGE ... 10W30 vs. 10W40 Oil | What's the Difference Between 10W30 and 10W40 Oil | Partzilla.com. Scotty ... The car calls for 10W30, you won't gain any appreciable benefit using synthetic oils. You engine is suseptible to a number one main ... The difference between 10w30 and 10w40 is the thickness of the oil at operating/high temperatures, at which 10w40 is thicker than 10w30. 5W30 vs 10W30. Learn the key differences between 5W30 and 10W30 engine oil in this comprehensive video from Honest Mechanic. The newer 10w40 is better for valve train noise. Is this true? I have typical "loud" valve chatter/ injector "tapping" noise on my gen 2rt10. Will you pick engine oil 10W-40 or 10W-30 for your car? Not every car driver know how to choose the best car engine oil for themselves. The main difference between the Castrol Edge 10W-30 and Castrol MAGNATEC 10W-40 lies in their high-temperature viscosity and their targeted use. The only time you have to even consider going to thinner oil when it gets cold is if the starter can't turn over the motor fast enough to start the motor.