ferg

lol be nice

vol245

Checkout the chart in this thread.

https://www.rx8club.com/australia-new-zealand-forum-37/rx-8-series-ii-owners-manual-engine-oil-161616/#post2749156

It looks like I should be running either straight 40 weight or something that ends in 50. I don't see the point in 10-30. I just bought the car so it most likely has 5-20 since the dealership I bought it at changed the oil. At least four of the quarts are 5-20. It is a '05 MT. I will probably put 20-50 in it around March or early April.

ken-x8

That chart shows that 5w20 covers the whole range for which straight 40 is suitable. So if 40 is OK, then so is 5w20.

I had been feeling good that my dealer put in 5w30 for the past couple of oil changes, instead of 5w20, but I see that those two grades are interchangeable.

Ken

GaMEChld

Hmmmm... so If I assume weather where I am at won't be below 0 Fahrenheit, I can go ahead and use 20w-50? I am running 10w-40 at the moment, but I might make that switch, being turboed and all.

LionZoo

Long Island can get pretty cold. I wouldn't use 20W-50 in the winter. In fact, I might even consider switching to a 30 weight in the end of winter.

GaMEChld

10w-40 is what my turbo manufacturer stated for my location, so I won't go below that weight. He recommended 20w-50 for those is the very hot areas. I guess ill just stick with what I have and not worry about the heavier weight. I'm not going to be changing seasonally, as I am using Royal Purple which is fully synthetic, so the changes will be less frequent than seasonal.

SilverHokie

iTrader: (1)

Never mention what oil you have in your car and if they ask...lie. How are they gonna know unless the latency is just ridiculous?

PaPaBear

+30,000 miles on re-build using 5w20 conventional oil in South Florida heat. Run the engine hard and only problem I have is slow to start and low RPM delay. I do not think the oil I have used has anything to do with these problems. Putting car into shop to re-place plugs, coils etc. K&N drop in, only mod. Car flies once out of low RPM's. Change oil at or below 3000 miles.