Originally Posted by
Korey Harbke
Well, I asked Hiro at HB. He said that HPI oil runs VERY thin... when I say very... I really mean VERY. He said HPI 80wt is pretty close to Losi 45wt. I have not had any personal experience with this though, so I can't confirm. Hiro is a trusted source though, as he is on the R&D team
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-Korey
Yes, I noticed that. I used run 70 to 80 wt HPI oil in my car. I just switched to HPI molded pistons with really tiny holes, so I can run some where around 40 - 50 wt. I have the entire range of HPI oil, so it would be quite costly for me to switch to another brand.
Any chance Hiro may have the conversion between HPI oil and AE / Losi, or the CST equivalents?