Is it okay to use Royal Purple 5W-30 instead of 10W-30
yes. And you are better off running 5w30 all the time (vs 10w).
5w30 will flow better when cold and be the same 30w when hot.
Whose advice do you trust - Honda's engineers who designed and built your car and wrote the manuals for it, .......Keep in mind, those engineers specify using 10W30 with ambient temperatures over -2F, and 5W30 for temperatures under 36F. So if you're asking what to use in frigid winter conditions, the engineers say 5W30. But they say 10W30 is best in moderate to warm temperatures.
I will be parking my NSX this winter so it will not see any cold start up's.The reasion I have a case of 5w-30 its from my RSX TYPE-S that I traded for the NSX.
That's simply not true. Advanced synthetic fluids were as much a part of the mainstream of automotive maintenance twenty years ago as they are today, with plenty of people using Mobil 1 back then, and a few spending the big bucks for Amsoil, Royal Purple, and Redline, all of which were widely available and discussed back then.And 20 years ago, before advanced synthetics with their significantly higher shear strength than the then prevalent organic oil made their way into the mainstream of automotive maintenance
That's simply not true. Advanced synthetic fluids were as much a part of the mainstream of automotive maintenance twenty years ago as they are today, with plenty of people using Mobil 1 back then, and a few spending the big bucks for Amsoil, Royal Purple, and Redline, all of which were widely available and discussed back then.
Is it okay to use Royal Purple 5W-30 instead of 10W-30
I purchased a brand new car back in 90. until today, i keep using the same brand of motor oil. For 21 years, i've had no oil leaks. All i've needed to change has been the front seal and valve cover gasket. Another car i used all brands of oil, and after 8 years, oil leaks everywhere.
The cost of replacing this engine might put us in the poor house.I think I will sell the box of 5W-30 to a buddy and buy 10W-30.Thanks to all who answered this thread
Only if you're planning on driving it during frigid winter weather, according to the manual. If you're going to let it sit all winter till the temperatures are above freezing, it says to stick with 10W30.5w-30 would be better in your colder region.
There's no reason you can't switch back to full synthetic, if you want the full benefits of synthetic (better resistance to breakdown when hot, better flow characteristics when cold). As for the viscosity, you can decide for yourself based on the information in this topic, in your manual, etc.So basically it was a 10w-30 full synthetic before and he went with 5w-30 synthetic blend for this current interval (car has 100k miles now). I'm debating on whether I should switch back permanently or stay with the 5w-30 synth blend since that's what it's at now.
Blends are not 100% synthetic. While I don't care to get into a big debate, I agree that 5W30 and 10W30 should have the same viscosity performance as a straight 30 weight oil at operating temp (which is tested at 210*F) temps. The first # is the "Winter" rating, or cold viscosity. The 2nd number is the viscosity at 210*F.Well then since I'm in a hot region... should I switch back to 10w-30? Or I should I just ride out a mild winter with 5w-30 and then go to 10 in the spring?Or I can just stick with 5w-30 haha.
My car had 10w-30 all the time up until this July when Nabil put 5w-30 in it (he wasn't sure if 10w-30 was in it before that but now I know that it did after looking at the records). I'm buying my oil tomorrow morning so I just want to do it right. So basically it was a 10w-30 full synthetic before and he went with 5w-30 synthetic blend for this current interval (car has 100k miles now). I'm debating on whether I should switch back permanently or stay with the 5w-30 synth blend since that's what it's at now.
Blends are not 100% synthetic. While I don't care to get into a big debate, I agree that 5W30 and 10W30 should have the same viscosity performance as a straight 30 weight oil at operating temp (which is tested at 210*F) temps. The first # is the "Winter" rating, or cold viscosity. The 2nd number is the viscosity at 210*F.
If you have a supercharger or track your car, it might be a good idea to go with a 40 weight oil like a 0W40 or 5W40. For the case of a 5W40, it has a lower viscosity which is better at cold startups and a higher shear rating at high temps than a 10W30.
I also don't buy into the whole OEM tires, tire pressures, Oil makes, Oil weights, suspension -as the best thing out there. Look at your intended uses, understand what you're dealing with and go from there.
0.02
If it were my car, i would use M1 0W40 or Rotella T6 5W40 for cold startup and high protection as described earlier. If i wasnt going to drive the car too hard, i would use 5W30. Either way its even more important to do a proper warmup and cooldown with a turbo car. That and frequent oil changes.Billy
What do you recommend for a turbo car then if not tracking. 5w40 in the winter and 10w40 in the summer? Or still go with the 10w30? I drive in PA and plan to drive when it's freezing out.
+1I also don't buy into the whole OEM tires, tire pressures, Oil makes, Oil weights, suspension -as the best thing out there. Look at your intended uses, understand what you're dealing with and go from there.