You'll need to flush out the transmission cooler as there's a technical service bulletin on this and install Dextron 6 along with a new filter. This is a synthetic fluid that's compatible with your car and solves the problems with Dextron 3.
its the same process as changing synthetic oil, except you use regular oil.
No.No.
No contest. -Synthetic oil is way better, but can you afford it. -I think using regular oil and changing every 3,000 is better.
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No it is fine to switch back to regular oil.
Mobil 1 synthetic
You change it according to the manufactures recommendations which will be at a certain mileage.
Why would you want to go back to a non-synthetic oil. Synthetic oil's are far superior to non-synthetic oil.Hope This Helps.AnswerNo, todays oils are compatible and it won't hunt anything changing back and forth
Yes, you need.
Castrol Syntec. I recommend when switching to synthetics from conventional, that you run a synthetic blend for 6,000 miles (two oil changes) then change to full synthetics. If you have no experience with changing oils (especially changing from conventional to synthetics) I do not recommend you attempt this.
Is everything else the same ? weight of the oil, Driving conditions, the same drivers , tire pressure ?A slight drop in tire pressure could easily cause a 2% mpg increase. More traffic could mean more idle time.Everything being the same...sorry I havn't a clue why mpg would be more.
depends on what oil your talking about if your changing the motor oil is synthetic oil that must be used. BMW recommends castros synthetic oil but its all your choice on what synthetic oil you want to put in it. i have royal purple in my 325i 2003 and it feels alot better to drive.