Never had to add in between filter changes and the engine was the only thing that was never touched in that vehicle. Still going strong with other owners AFAIK. Engine never apart so I couldn't really inspect parts.

Oils meeting ILSAC GF-4 requirements (usually 0W-20, 0W-30, 5W-20, 5W-30 and 10W-30 SM oils) cannot have the following restrictions on phosphorus and sulfur:

and that too if the car is used for actual racing. Otherwise, the catalytic converters are still going to get damaged if the car is Think of using a sloppy quality synthetic engine oil during extreme winter conditions. The oil gets solid and it prevents the engine from turning over smoothly. That’s what happens when Valvoline VR1 is used for regular non-racing cars. It would be better to admit that this oil was made for racing cars, and other street-legal racing vehicles, such as Mustang, Camaro 406 and vice versa. As engines age past 75,000 miles, parts begin to wear down causing reduced gas mileage, lower horsepower, and a shorter engine life. That's why we created Valvoline High Mileage motor oils formulated specifically to combat issues like friction, deposits and sludge in aging engines. The oil also helps increase your vehicle gas mileage while reducing unnecessary engine wear at extremely high and low temperatures. However, as synthetic oil is derived through a complicated production method, the oil costs more than conventional motor oils. Tailored for gasoline and full or partial alcohol fuels Since race car engines have extremely high RPM, the oil requires additional lubrication, perfect viscosity and just the right amount of anti-wear additives for maximum performance. In that realm, Valvoline Co. managed to get the percentages right – and that is exactly why this oil is the number one preferred brand among race car owners from all over the world.

Converters and Catalytic Converters, it is better to talk to a professional or someone who has experience with both engine types. Valvoline stands behind the flat-tappet and more aggressive type cam applications 100% with our Valvoline VR1 and NSL Racing oils. The proof is in our product information sheets, which are online for the viewing as well. I had similar concerns about the current SM oils being sold so I inquired to the API tech line and this is what I found. We do not disclose this information. One reason is that there are oil companies that strive on numbers alone and try to make it a numbers game. Well the problem we have with this is that the other oil companies could try and get the same numbers as we have even if their product does not have the same quality and performance gains as ours. This could make a customer think they are buying a great product based on the numbers. If all the numbers on the sheets are the same how would you decide on which oil to choose? Price? All I can tell you is our motor oil exceeds the levels for the API service SL and our MaxCycle and XPR are even beefier than that. Thank you for understanding. What application are you looking to protect? If it is a flat tappet cam or a high performance cam, you will be safe to run any of our oils. So, let’s see how you can ensure that your racecar stays in top-notch condition throughout the season.

Comparison

The worst thing that can happen to a racecar driver is to experience vehicle failure or malfunction. Such a predicament can end up affecting the seat time and leaving the driver weeks behind. And we can all agree that nobody likes to lose, especially if racing for profits. Here are the product information sheets with test results for all of VR1, Not Street Legal conventional, and Not Street Legal Synthetic. converters. These converters are also installed in sports bikes that are above 600CC category. Now if you don’t know about Cam