After 10,000 miles, I start using 10w30. You will lose a low percentage of gas milage but in return, prolong engine life further. $0.02
excellent write up, thanks!:thmsup:5W-20 offers an increase in fuel economy and to this point have shown to be pretty good oils, plus they offer better low temperature performance.
5W-30 offers good cold weather performance and good high temperature protection to an extent but have not shown to be notably better than 5W-20 oils in applications where 5W-20 is reccomended.
10W-30 offers the best high temperature performance.
Question: What are the negative aspects of using a 5w20 oil?
Answer: 5w20 oil has less film and shear strength than a 5w30, 10w30 or a 0w30 motor oil. This can lead to increased engine wear under today's demanding heat and high-stress engine performance conditions.
Question: Don't I have to use a 5w20 oil to maintain my factory warranty if my manual recommends a 5w20 oil?
Answer: Absolutely not. Vehicle manufacturers recommend using motor oils meeting certain viscosity grades and American Petroleum Institute service requirements. Whether the motor oil is a 5w20, 5w30, 10w30 or 0w30 or even a synthetic vs. a petroleum-based oil will not affect warranty coverage. The manufacturer is required to cover all equipment failures it would normally cover as long as the oil meets API service requirements and specifications and was not the cause of the failure.
Bottom line, thicker = less engine wear, particularly in summer California where temperature in my area could reach up to +100F for weeks. This is why I always use 10w30 for summer and 5w30 for winter.
The engine isn't designed around a specific grade of oil. The grade's of oil will work better in different environments. You wouldn't run the same oil in Alaska that you would in Texas.Um.... If the car was designed to use 5w-20, why do you want to put something else in it?
Unless you are an expert Honda engineer?
If so, can you come over and fix my Pressure Washer?
Not if oil pressure is within normal parameters, which will always be the case with 5/30. Remember 30 weight oil will probably be 20 or less by the time you change it, so imagine 20? And I would be more worried about LOW oil pressure with too thin hot oil than high pressure where I live.Doesn't a thicker oil produce more oil pressure, thereby wearing out seals/gaskets faster?
Would you happen to know what the normal range is?Not if oil pressure is within normal parameters, which will always be the case with 5/30. Remember 30 weight oil will probably be 20 or less by the time you change it, so imagine 20. I'm NOT willing to save 0.1 MPG with 20 oil in hot TX. As Zexen said, Alaska is very different than TX; that's why just a few years ago owner's manuals used to have viscosity ranges based on predicted temperatures, but many young folks here didn't even drive in 2003.
It's all a matter of preference. All this extra care is really over the top since the great majority of us won't keep our cars more than 100K miles. And some of us probably not even 20K :lmao:.
Don't have a service manual yet, but unless you plan to use BMW's 10/60 oil, it's of no concern at all. Plus you don't even have an oil pressure gauge anyway.Would you happen to know what the normal range is?