gathermewool
Site Donor 2023
Originally Posted By: Apollo14
Actually, I'd say engines are putting greater and greater requirements on oil due to increased heat for greater efficiency and wanting thinner oil for greater efficiency.
So engines and oils improve together and the vehicle and oil companies work together. Modern oils are superb, mainly because the requirements of modern engines.
Therefore, if you put a modern oil in an older car, you will for sure obliterate the need for 3000 mile oil changes as well as the manufacturer oci at the time the car was made.
Whereas using lower quality oils even if they are modern, in certain modern engines, would in some cases require more frequent ocis than manufacturer's currently specify.
Eg 0w20 in a Toyota allows double the oci of modern conventional oil. Eg dexos is a modern oil vastly improved over just API standard but you can't put it into most German cars that require full synthetics.
Of course, I agree that the answer to the OCI question is: it depends. What another poster rejected as too many variables was exactly my point; however, many cars, even modern, can expect to achieve conventionally extended intervals (>> 3k miles; >> means much greater than,) especially if higher quality "synthetics" and synthetics are used.
The emissions control systems due add more solids and higher temperatures into the equation, but newer engines are also digitally-designed, with computers changing coolant and oiling channels, thicknesses and materials to minimize stresses, hot spots, etc. I'll state now that I don't know that for a fact how today's engines are designed, but I'd guess that they're a heckuva lot more sophisticated than engines of yesteryear, which means cooling channels, oiling passages and patterns, etc. are all probably a heckuva lot more efficient than before.
In the end, I'd have to guess that the better designs and oil technology far outweigh the increased demand.
Actually, I'd say engines are putting greater and greater requirements on oil due to increased heat for greater efficiency and wanting thinner oil for greater efficiency.
So engines and oils improve together and the vehicle and oil companies work together. Modern oils are superb, mainly because the requirements of modern engines.
Therefore, if you put a modern oil in an older car, you will for sure obliterate the need for 3000 mile oil changes as well as the manufacturer oci at the time the car was made.
Whereas using lower quality oils even if they are modern, in certain modern engines, would in some cases require more frequent ocis than manufacturer's currently specify.
Eg 0w20 in a Toyota allows double the oci of modern conventional oil. Eg dexos is a modern oil vastly improved over just API standard but you can't put it into most German cars that require full synthetics.
Of course, I agree that the answer to the OCI question is: it depends. What another poster rejected as too many variables was exactly my point; however, many cars, even modern, can expect to achieve conventionally extended intervals (>> 3k miles; >> means much greater than,) especially if higher quality "synthetics" and synthetics are used.
The emissions control systems due add more solids and higher temperatures into the equation, but newer engines are also digitally-designed, with computers changing coolant and oiling channels, thicknesses and materials to minimize stresses, hot spots, etc. I'll state now that I don't know that for a fact how today's engines are designed, but I'd guess that they're a heckuva lot more sophisticated than engines of yesteryear, which means cooling channels, oiling passages and patterns, etc. are all probably a heckuva lot more efficient than before.
In the end, I'd have to guess that the better designs and oil technology far outweigh the increased demand.