We have an s40, 2007. Should we continue getting synthetic oil? It seem pricey...just dont know if its worth it.

 

Keep using synthetic.

 

Yes it is worth it... Check http://www.carbibles.com/engineoil_bible.html

and http://motoroilbible.com/


The second has a very important recommendation.. It is EXTREMELY important to have the best possible Air filter because it retain the dirty BEFORE it reaches the engine and is captured by the oil...