best oil to run ?

what oil should i be running in my series 1 d 17 and my ca? thanks for info best filters also pls

Modern oils are beneficial to engine life. Before detergents and other additives 35,000 miles was good engine life between rebuilds. With detergent oils suddenly engines ran at least 100,000 miles between rebuilds in cars.

Besides detergents modern oils contain anti corrosion additives so when there's moisture in the oil and copper/silver bearing inserts are next to steel crankshafts, the battery from moisture and the different metals is prevented from corroding the bearing inserts, giving a much longer life.

The most modern oils can be short on additives for sliding cam followers so diesel rated oils should treat vintage engines better.

Gerald J.

we use cen pe co 15/40 diesel oil in all our allis, gas and diesel engines.but I don't use them in the winter.

Years ago farmers had one tractor that did all the  work on the farm. That tractor was run hour after hour, days on end, daylite to dark, plowing, disking, planting & harvesting. The wc, wd, & wd45s were some of best. They had no hour meters on them. Most of them ran 10 or so years, before needing rebuilding. Back then the only engine oil available was non detergent ML & MM straight wt oil. As time went on the new detergent oils came into the picture, so most farmers went to the socalled better oils, after the rebuild. Most needed rebuilding in about A year or so after. You draw your own conclusions about this. 

Make life a little easier on yourself. Shell Rotella-T 15/40 in everything. I use it in D-17,200,truck,car lawn mower,gator and skid steer. Never had an issue.

KY.ALLIS      I think you need to know your Rotella -T 15/40 oil, is not the same formulation as it was A few years ago. Reduction of the zinc content, was one change, zinc is A antiwear additive. Check for yourself.     

I have been using 10w 30 detergent, in a half dozen tractors for about 10 years. Works great. The 10w part is good for winter starts, and the 30 wt was original design and still a good weight running oil.

The W in the oil id means winter not weight. So 10w/30 , means 10winter 30sae. 30w means 30 winter. Sae 30 is A different oil, for summer use.  

Winter (w) ratings only go to 25 (rarely if ever produced).  There is no  API 30w oil-------only 30 weight.

What condition are the engines in?  What oil has been used?

well they both start up good i jstu got both tractors so im not really sure my d 17 has original oil pressure gauge and it drops to 0 when im run it for about 5 mins so its got me nervous

yes they both do

what a mess wrote: yes they both do

OK, then, If they were mine, I would be using the same oil I'm using in a wide variety of engines------------------Mobil 1 5w-40 Turbo Diesel oil.  It is also rated for spark engine use SL and SM.

A dino 15w-40 oil, as Steve recommended above, would work too.  However, with the synthetic Mobil 1, you wouldn't have to change oil as often.  I find that job less and less enjoyable as I get older and older!!  


Edited by 427435 - 30 May 2015 at 10:46pm

https://www.classiccarmotoroil.com/

Edited by DEP5 - 02 Jun 2015 at 6:41am

I've been using 15w40 for years n' years in all my Tractors and small equipment. Even in some of my older cars that I've sold, (and those owners are still driving them) and never had any problems. I change the oil a couple times in the power equipment I use within the year, and every 3K in the cars. I use synthetic oil in JoAnna's CTS Caddy only because that's what it came with and I stuck with that. I change that around 5K or so. The shop 03' Astro Van I use 5w30 as GM suggested since it was brand new. Again every 3K the oil and filter are changed. Everything else gets that 15w40. Some of the Garden Tractors have filters also. The way I use it, I should buy it by the 55 gal. drum! LOL!