Instead of using 5/30 oil in winter temps of 35 degrees what are your thoughts of thinning 10/30 a tad with either one of these? Rpm never over 3500.But Rislone has a base oil in it,,so might take that out of the actual question
Just curious ![[Smile]](images/icons/smile.gif)
![[Smile]](images/icons/smile.gif)
quote:Among other problems, the thinned oil will no longer meet the 30 wt. visc spec when hot. Ken
Originally posted by dragboat: Instead of using 5/30 oil in winter temps of 35 degrees what are your thoughts of thinning 10/30 a tad with either one of these? Rpm never over 3500.But Rislone has a base oil in it,,so might take that out of the actual question Just curious![]()
quote:I assume you mean +35F. You could even run a 15w50 at those temps. I know you're concerned about pumpability but I read somewhere that as you get under 0F the force required to move oil doubles every 5 degrees the temp decreases. Maybe Molakule can help me here. The need for a 10wX doesn't crop up until 20 F at the earliest. (For those ultra worried about pumpability) Those of you always worried about pumpability, back me up here or school me, please
Originally posted by dragboat: Instead of using 5/30 oil in winter temps of 35 degrees what are your thoughts of thinning 10/30 a tad with either one of these? Rpm never over 3500.But Rislone has a base oil in it,,so might take that out of the actual question Just curious![]()
quote:Looking at the specs on a lot of good 10w30s, they'll flow even lower than that. Mobil 1 10w30 has a pour point of -49F, and Shaeffers 10w30 will also flow down very well at that same temperature too. So I personally still don't see the need for 5w30 at all based on this. It'll never ever get anywhere near that cold where I live. And I venture to say it doesn't often get to -49F in too many places in North America. If so, it'll happen maybe once or twice a year at the most.
Originally posted by jjbula:quote:I assume you mean +35F. You could even run a 15w50 at those temps. I know you're concerned about pumpability but I read somewhere that as you get under 0F the force required to move oil doubles every 5 degrees the temp decreases. Maybe Molakule can help me here. The need for a 10wX doesn't crop up until 20 F at the earliest. (For those ultra worried about pumpability) Those of you always worried about pumpability, back me up here or school me, please
Originally posted by dragboat: Instead of using 5/30 oil in winter temps of 35 degrees what are your thoughts of thinning 10/30 a tad with either one of these? Rpm never over 3500.But Rislone has a base oil in it,,so might take that out of the actual question Just curious![]()
Likewise 5wX isn't needed until 10 F for the same folks. Some would argue 10wX is good to 0F and 5w to -20.