Add to Niner's comments on 'recommended'...
In the world of lawyers...'recommended'...is a 'defined term'
Meaning that if you don't follow the OEM's 'recommendations'...you most likely
will NOT be covered under warranty
Think about that...you don't follow their 'recommendations'...so why should they
provide warranty to you?
The Magnuson–Moss Warranty Act usually is brought up on this type of topic
It only applies if you used components that did NOT modify the specification
of the OEM and that the material/part/etc provider will stand up to their
certification or claim that it is up to OEM specification
Like tuners will void warranty, as it changes the OEM's specification (torque
and HP are the main ones).
Why would anyone use less than spec motor oil anyway? The pennies saved vs the
THOUSANDs of bucks isn't worth it to me
