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Both the Mobil 15w-50 and their 5w-40 Turbo Diesel oil have plenty of zinc for flat tappet cams.
Get an oil sample kit from Blackstone (free) and take a sample. About $35 for a test including TBN. Then you can stop guessing about the condition of your engine.
my grease gun took a sh*#...and looks like my (end of grease gun nipple is pretty big)....is there a smaller fitting to get INTO THE 1/2 SHAFTS to apply some grease?? I have seen some discharge nipples smaller around and sort of long and pencil shapped....any ones thought on that?
Years ago when I still ran grease-able ujoints I ground the sides of a grease gun nozzle to fit. Rotate the shafts till you get the widest opening. Worked very well.
Of course now I run the solids cuz I got tired of breaking the weaker greasables. If I ever have the shafts out I check the non greasables and they don't need greasing.
superb reply....I asked if rotating the shafts would open up the joint to the widest point....but YOU are the one who has done it and willing to share it....as I have learned to ask the forum guys... before you start something ....even if its a dumb question...txs
Originally Posted by 00fxd
Years ago when I still ran grease-able ujoints I ground the sides of a grease gun nozzle to fit. Rotate the shafts till you get the widest opening. Worked very well.
Of coarse now I run the solids cuz I got tired of breaking the weaker greasables. If I ever have the shafts out I check the non greasables and they don't need greasing.
Ken - normally I'm with you on the "don't overthink it".. but realize that 10W-30 is not the same as it used to be. Stuff (zinc and phosphor) have been been lowered/removed because modern engines don't need it. Lots of old threads to search on this.
I have read everyone's responses on this thread and other threads about engine oil plus read @SWCDuke 's informative article. Though there is some variety in the opinions on best engine oil, most people seem to go with 15W40 viscosity. The info I can't find anywhere is why are so many people going with 15W40 even though GM originally recommended 10W30 for our C2 engines? Is it a matter of convenience because it is difficult to get 10W30 with the CJ-4/CI-4 service category, or is 15W40 now better than 10W30 for some reason beyond the service category designation? Thanks to anyone who can clarify regarding this aspect.
10-30 was common in the 60s. 15-40 is common now.. We use 15-40 because it's what's out there.
The label is different and the price has gone up, but this is still the stuff to use.
Thank you, @65hihp . I bought some yesterday, and this question re-emerged in my mind since the current labeling says "Heavy-Duty Diesel Oil. Low Emission Diesel.", which got me thinking why everyone is recommending this. It seems to be the thing, though!
Just for additional thread reference, here is the current label (currently priced at $11.67 per gallon): Walmart SuperTech 15W-40 engine oil
03-20-2016, 06:47 PM
