Precise1 Posted September 20, 2014 Share Posted September 20, 2014 Actually cost per year is least for amsoil than any other oil since it's life span is so long. You will go through 2 oil filters before you have to change the oil. I was surprised by this but the third party tests state 11300 miles of extreme use between oil changes and it doesnt lose wear protection until 25000 miles. Costs 50$ per 11300 miles which is damn reasonable if u ask me. Pretty impressive What I don't see addressed in any of this, and what I know the oil filter doesn't take care of is all the blow-by contaminants; the micro particulate and the acidic nature of used motor oil, especially in an older motor. Wear protection doesn't matter if the oil is etching everything when it sits. B Link to comment Share on other sites More sharing options...
ahardb0dy Posted September 20, 2014 Share Posted September 20, 2014 Mobil 1, Penzoil platinum , Link to comment Share on other sites More sharing options...
Nefarious Posted September 20, 2014 Share Posted September 20, 2014 What I don't see addressed in any of this, and what I know the oil filter doesn't take care of is all the blow-by contaminants; the micro particulate and the acidic nature of used motor oil, especially in an older motor. Wear protection doesn't matter if the oil is etching everything when it sits. B you are correct on that one B. I don't see anything of that nature either. I'll look into it just out of my own curiosity. I would imagine if you have weak piston ring (s) and do not have perfect compression than blow by is something that must be taken more into account on an aging motor. Personally, both kat and I pathfinders have been vg33e swapped with perfect compression vg33e that are literally like new (actually a little better at 180 psi exactly across all 6 cylinders) and we are also running catch cans to avoid Pcv recirculation of oil so I don't think this would be much of an issue for us BUT the acidity is something unavoidable. I think I may contact the company and see what their answer is for that one. Thanks for bringing that up and I'll update here if I find anything. I'm curious more than anything! Link to comment Share on other sites More sharing options...
enkrypt3d Posted September 21, 2014 Share Posted September 21, 2014 As soon as I put Royal Purple 10w30 in, it makes a terrible racket when its starting up cold.... but then goes away. Should I go back to regular oil? I've never had any issues like that with RP.... Link to comment Share on other sites More sharing options...
12A Posted October 3, 2014 Share Posted October 3, 2014 What grade were you running previously? As for me, I use penrite 20w50 mineral for my z24. When new motor goes in she will be run on hpr5. 1 Link to comment Share on other sites More sharing options...
enkrypt3d Posted October 3, 2014 Share Posted October 3, 2014 It was using the same grade 10w30 but it wasn't synthetic. I've never seen a motor do that when switching to Royal Purple though... motor has 162K miles on it. Might be time for a rebuild anyways. Link to comment Share on other sites More sharing options...
Rebelord Posted October 4, 2014 Share Posted October 4, 2014 Mobil 1 5W-30 Synthetic High Mileage or Valvoline 5W-30 Synthetic High Mileage. Always with either a Mobil 1 or Bosch filter. Link to comment Share on other sites More sharing options...
ahardb0dy Posted February 23, 2015 Share Posted February 23, 2015 running Mobil 1 high mileage 5/W30 in my 93 Hardbody Link to comment Share on other sites More sharing options...
kdj Posted February 24, 2015 Share Posted February 24, 2015 Me too, Mobil 1 (5/30) in both the Pathfinders. Since I've been buying by the gallon for oil changes I use it in the lawn tractor and ATV as well. Link to comment Share on other sites More sharing options...
gv280z Posted February 28, 2015 Share Posted February 28, 2015 (edited) I tend to float between Mobile 1 10w30 Synth and Castrol synth. But always go with the mobile 1 synthetic oil FILTER. A good filter is just as important as the oil. On occasion I've just changed the filter halfway through an oil cycle just to freshen it up. I used to think Royal Purple was the answer and God's gift to engines, until I blew an engine while running it. However, in retrospect that engine blew after I had been making multiple consistent 120 mph runs in my Honda Prelude and I'm guessing I'd been burning oil the whole time and didn't know it...finally it just went. I haven't gone back and tried it again since then. Edited February 28, 2015 by gv280z Link to comment Share on other sites More sharing options...
Nefarious Posted March 2, 2015 Share Posted March 2, 2015 Amsoil Link to comment Share on other sites More sharing options...
00PathfinderSE Posted March 17, 2015 Share Posted March 17, 2015 conventional Castrol always on my Nissans. Runs smoothest and quietest on my VG33, VQ35, my old VG30, and old 2400 Inline 6. Link to comment Share on other sites More sharing options...
CDN_S4 Posted March 17, 2015 Share Posted March 17, 2015 Castrol synthetic for me too. Link to comment Share on other sites More sharing options...
kdj Posted March 17, 2015 Share Posted March 17, 2015 Personaly I've found oil doesn't matter much because no matter what I do the motors, they are still running strong long after the truck (I'm on the 3rd) has rusted beyond driving. My Hardbody (farm truck) snapped in two last year and if I don't get the rear frame rails replaced this year, the front half(cab and motor) are going to be the generator for the cabin next winter. The three together are getting close to 1,000.000KMS. Link to comment Share on other sites More sharing options...
SteeevO Posted March 19, 2015 Share Posted March 19, 2015 I've been a fan of amsoil the last few years.. good stuff. Link to comment Share on other sites More sharing options...
k9sar Posted March 19, 2015 Share Posted March 19, 2015 I put the cheap sh!t in. Mine leaks enough that I need quantity rather than quality. On a positive note, it's never in there long enough to breakdown so the longevity of the oil is not an issue. Link to comment Share on other sites More sharing options...
92Path_68CJ Posted March 20, 2015 Share Posted March 20, 2015 Motul 300V in the pathfinder.... Jeep gets pretty much whatever. I put so few miles on it a year that I just change it once a year. Typically Castrol synthetic. Link to comment Share on other sites More sharing options...
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