Wat grade oil do you use in your GSR(b18c)....i will start it i use OEM honda 20w 50w oil.....i wanna kno wats the best grade to use 4 NA??

 

5w30 supertech dont know about 20w50......most 4 cylinder factory recommends 5/30 or 10/30

 

Everyone's got an opinion. Here's mine.

Thicker oil than what the manufacturer recommends will actually harm, not protect your engine. That's because of tight tolerences in the bootom ends these days. These aren't blocks from the 60's or 70's.

 

5w30 Castrol Syntec...

 

so wats the oil recomended for B18c?

 

5w30 or 0w30

20w50 is just way too thick for a honda

 

5w- 20 synthetic for me