Hi,
my car originally calls for engine oils typically in the range of 10W40 or 15W40. I've run on 0W30, 10W40 and for a loong time 5W40 without any problem. Recently I switched to a 5W50 100% synthetic oil (think it's rebadged Mobil 1) which has been top rated in a review. I was motivated to use this oil because it was rather cheap (rebadged but it is Mobil1 oil old formula) and because my car has now 240,000km so I assume that clearances are bigger than when new...
I've run 6000km with this oil until now and I've seen that the engine temperature is almost 10°C lower than with the 5W40 I used before!!! This may sound good but my engine runs at 70°C, is it too low???? And the engine takes much more time to heatup in the morning: maybe this is not good too no?????
I also see that the mpg is lower than before as I burn 1liter/100km more than I did with the 5W40. I assume this is due to the elevated SAE 50 grade but is it normal that it does such a big difference?
My main concern is with the "too low" engine temp. Is it a problem or a good thing mainly considering the fact that the heatup time is much more longer now?
my car originally calls for engine oils typically in the range of 10W40 or 15W40. I've run on 0W30, 10W40 and for a loong time 5W40 without any problem. Recently I switched to a 5W50 100% synthetic oil (think it's rebadged Mobil 1) which has been top rated in a review. I was motivated to use this oil because it was rather cheap (rebadged but it is Mobil1 oil old formula) and because my car has now 240,000km so I assume that clearances are bigger than when new...
I've run 6000km with this oil until now and I've seen that the engine temperature is almost 10°C lower than with the 5W40 I used before!!! This may sound good but my engine runs at 70°C, is it too low???? And the engine takes much more time to heatup in the morning: maybe this is not good too no?????
I also see that the mpg is lower than before as I burn 1liter/100km more than I did with the 5W40. I assume this is due to the elevated SAE 50 grade but is it normal that it does such a big difference?
My main concern is with the "too low" engine temp. Is it a problem or a good thing mainly considering the fact that the heatup time is much more longer now?