5/30 or even 0w mobil 1 is too thick. I tested the viscocity between Mobil 1 and 5wt Bel Ray fork oil, and there is no comparison. I used 2 small dixe cups and poked a pin hole trough the bottom of each cup. I filled each cup with oil and timed how long it took each cup to drain. By the time the fork oil had drained the Mobil 1 0w oil still had 3/4 of a cup remaining. At that point I knew even the thinnest motor oil would not work as fork oil.
When I bought my DRZ the forks were really stiff. Went to change the fluid and the dood had put motor oil in there. Mo better after putting ATF in there . .
2005 KDX 220
R&B Carb Mod
R&B Head Mod
Fork Swap - 99 KX125 Valved for B woods plush
FMF Gnarley
Airbox Mod
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