ROAD_DOGG33J
Premium
- 14,591
- IL, USA
- holyc0w1
- holyc0w
In the manual for my car, it says 5W-30 is recommended. But I think my dad has been using non-synthetic 10W-40 oil the whole time he had the car.
So I looked up oil grades online and it said that manufacturers (like GM) recommend 5W-30, because it's a bit better for fuel economy. But they also mentioned that it may not be good for the engine in the long-run. Yet on various sites, there were some people claiming that the fuel economy claim proved true or that they had worse economy when they switched.
The car currently has about 95,000 miles on it and is mainly used for short distance driving.
So, I guess the questions are: Is a higher-grade oil better for older engines? What grade of oil should I be using? and What are the effects of running a higher or lower grade than is recommended?
Thanks in advance
So I looked up oil grades online and it said that manufacturers (like GM) recommend 5W-30, because it's a bit better for fuel economy. But they also mentioned that it may not be good for the engine in the long-run. Yet on various sites, there were some people claiming that the fuel economy claim proved true or that they had worse economy when they switched.
The car currently has about 95,000 miles on it and is mainly used for short distance driving.
So, I guess the questions are: Is a higher-grade oil better for older engines? What grade of oil should I be using? and What are the effects of running a higher or lower grade than is recommended?
Thanks in advance