how should the 3 5 door be driven to break the engine in so that it does not have very many problems

 

dont bring the engine speed more than 5000rpm.
dont keep the engine at a constant speed for too long a period of time.
drive smoothly...shift around 2500-3000 rpm.

once your engine reaches 600miles/1000kms youre good to go.

 

anybody having troubles with the mazda 3? My mazda is already on the third motor comming. Does anyone else have this problem?

 

3rd motor. Not at all. What happened to your engines?

 

no engine troubles here...still have the original motor with 38000+ miles. whats gone wrong with yours?

 

knocking noises in the motor everytime reaches certain amout of kms bottom end case in this situation

 

According to the owners manual there is no special break in period. Following the break in rules will add to the performance and economy of your Mazda engine. The miles is 600 not 1000. (Note 1000 KM). During that 600 miles you should not

* Race the engine

* Do not maintain one constant speed, either slow or fast, for a long period of time

* Don't drive constatnly at full throttle or high engine RPM for extened periods

* Avoid unnesscary hard stops

* Avoid full throttle starts