straitwangin

could the slight clunking comming from the tranny when shifting becasue the fluid is low or needs to be changed? would flushing the system for royal purple be the answer?

n/a_threat

I use 5w-20 valvoline synpower everytime.

03 GT

5W-30 Royal Purple with Motorcraft Filter

In my opinion, 5W-20 is just WAY too freaking thin...

Hash06

isn't royal purple like 8 dollars a quart

monkeydude3

runnin regular vavloline max life 5W30. If the valve seals being replaced stops my oil chugging problem i'm goin to the max life synthetic

03 GT

I payed $6.99 a quart

ironh19

I paid 7 as well for royal purple.but considering you can go farther in between oil changes with royal purple its totally worth it.

SikGT

I use Royal Purple 10w30. I didn't seem to like the 5w20 cause near oil change time the car felt sluggish like it was working to hard and not going anywhere. Switching to the 10 seemed better. The car seems to stay strong all the way till the next due date. I occasionally like to open the hood after getting home especially after driving hard to help cool the motor. I've noticed when using the 5w20, that the motor seems to be extremely warm. But switching to 10w30, its not that hot. Even after multiple redlines in school zones.

StockD15b

not to thread jack, but how many quarts is the tranny?

Chopper

3.4 in the tranny.
Check out the oil site in my sig.It's kinda' like NASA for oil but it's a good site.