Haudi, I've seen the digi-guage ('87 4kq, no mods) up to the first bar above the line between 130 and 170 dC. ie: 170- <=== up to here - 130- If the LED's not red, is it safe to assume it's OK? Has anyone seen temps like this, or higher, while driving (like 85 MPH in 80 dF temps, no AC--YET)? I'm just curious if it's OK. I mean, 170 dC is 338 dF, which is pretty hot, even for Amsoil. tia, James