Need thicker oil?
#1
Need thicker oil?
I've noticed lately while towing (in AZ it's hot) that the oil pressure gets low. For example after towing for 30mins up a hill the oil pressure maybe get's up to 25. Then when I come to a stop it drops way down to 10.
Back in the day when we towed w/ a diesel excursion (no I don't miss it) we'd put thicker oil in during the summer. Has anyone deviated from the 5w-20 and put something thicker in? Would it help w/ my low oil pressure? The water temperature stays in check around 210-235. It's this low oil pressure I'm focus in on.
Back in the day when we towed w/ a diesel excursion (no I don't miss it) we'd put thicker oil in during the summer. Has anyone deviated from the 5w-20 and put something thicker in? Would it help w/ my low oil pressure? The water temperature stays in check around 210-235. It's this low oil pressure I'm focus in on.
#2
In the summer i do add lucas oil additive when i change the oil. Then in the fall I change the oil again and just run straight 5w30. I dont tow anything heavy though. Just a 16' boat and snowmobiles. Before synthetic oils this was something i did for added protection against wear and i have just continued doing with the synthetics.
Your oil pressure seems low to start with. My 03 typically sits around 40-45 regardless of what im doing with the truck.
I noticed your sig after i posted and you have an 08. So maybe someone with an 08-09. Can chime in on what their oil pressure sits at. Still seems low to me.
Your oil pressure seems low to start with. My 03 typically sits around 40-45 regardless of what im doing with the truck.
I noticed your sig after i posted and you have an 08. So maybe someone with an 08-09. Can chime in on what their oil pressure sits at. Still seems low to me.
Last edited by madmayo; 06-24-2018 at 08:56 AM.
#5
Yep, says it right on the fill cap. Just wondering if anyone has had ventured out and tried something different. Maybe I should go check out the silverado forums where they do more towing.
#6
As these engines get older I've started running thicker 10w40. On my GMC pickup (5.3L but essentially the exact same GM LS engine) it really helps - it had gotten to where it was using 2 quarts a month. Once I switched it over to 10w40 it uses almost none and has been perfectly fine for a few years. Also started running the same (Amsoil) 10w40 in my H2. We do have a pretty warm climate here so I'm not terribly worried about extreme cold weather.
#7
As these engines get older I've started running thicker 10w40. On my GMC pickup (5.3L but essentially the exact same GM LS engine) it really helps - it had gotten to where it was using 2 quarts a month. Once I switched it over to 10w40 it uses almost none and has been perfectly fine for a few years. Also started running the same (Amsoil) 10w40 in my H2. We do have a pretty warm climate here so I'm not terribly worried about extreme cold weather.
#9
Let me know your results with 10-40 . My h2 was at 40 steady. Little by little is going down . Now at 25 idle . 40 2000rpm
Also got a messenger for low pressure oil right at start.
I've been wanting to do a test with a analog gauge but disconnect the oil sensor is a big PIA
Also got a messenger for low pressure oil right at start.
I've been wanting to do a test with a analog gauge but disconnect the oil sensor is a big PIA
#10
Just got back from a 2700 mile towing trip w/ amsoil 10w-40 and filter. The pressure did increase a little. Just enough for me not to worry about it much. It would hold at 30 and stay slightly above 10 when stopped. I don't know if this had anything to do w/ it being amsoil or the weight of the oil. So the next oil change I'll go back to mobile 1 but use 10w-40.