Synthetic oil and older engines...

Well, i will tell you my experience, it was in about 1976, i had a new 1975 Chevy pick-up, with a 350. A older friend, had retired and started selling a product called Amzoil Synthetic Oil 25,000 mile oil.Well about 9,000 miles into it the lifters started to clatter, so i went back to conventional oil, just sold that very pickup, a month ago, with original tranny and engine,about 175,000, miles on it.Well Amzoil survived, and is a reputable company now,but i am sure their were a lot changes made since the start! Incidently he didn't sell it for very long!
 
Regardless of any articles found on the internet (if one looks they may find another article that says just the opposite) based solely on MY research and MY results I SWITCHED TO FULL SYNTHETOC YEARS AGO AND UNLESS SOMETHING CHANGES I DONT PLAN TO GO BACK. As always to each THEIR own choices of what oil to use, I have mine you have yours, right or wrong lol.

John T
 
In the winter time I used to feed a round bale a day with my Allis D-14, so it would only get used for about 15 minutes a day. In order to make things a little easier on it, I switched to synthetic. I was worried it would find a bunch of leaks for me, but it worked fine, and started a lot easier.
 
Ran a 98 f150 300 k 4.6 plus miles if frame hadnt rusted away still be driving it.
Back to the oil , run every kind of oil in it that was on sale , conventional,semi synthetic,synthetic high mileage and valoline reprocessed ,not one gave me any issues with a fresh filter, changed it every season .
Only data I have .
 
When I was working in the paper mill I used to occasionally attend lubrication seminars, usually put on by Mobil engineers. One of them stated once that synthetic oil has less cling effect, therefore reducing friction, but if it's in seldom used equipment it can be a problem. It can completely drain off the metal, resulting in a dry start. One time we pulled the cover off a gearbox that hadn't been used for some time, and all the metal above the oil level was rusty. We did use synthetic gear oil in equipment that ran hot and steady with great success. Same with engine oil, if it is frequently used in extreme hot or cold, absolutely use synthetic. Our old Farmall C, nope!
 
You can find an "article" that says anything you want it to say. Most people are just looking for someone to tell them what they want to hear, and stop listening/looking the moment they find it.

Nobody looks at the credibility of the source. Sometimes they build a flashy website with an official looking domain like "enginelabs.com" to make it look like there's a team of engine experts, when the reality is, it's just some guy in his mom's basement who gets off spreading confusion and chaos.
 
You can find an article that says anything you want it to say

AMEN Ive noted the same on here very often. Some person will Googgle and post an article they found and
they think that proves THEIR point but as you and I have noted, one can find another article saying the
EXACT OPPOSITE LOL

However I do appreciate those kind gentlemen who have the time to dig and research to post an answer to
some complex or off the wall subject most (including themselves) have no expertise in. Thats a good public
service as far as Im concerned...THANK YOU to those gents who take the time to search out answers to some
weird topics even though what they post may or may not be accurate, but hey they tried !!!

Best wishes to all here

John T
 

I started using Blendziol in two strokes racing motorcycles in the late 60's. I started using synthetic oil in everything but diesels in early 80's. And still do, So read and write whatever you want to.
 
I know in the semi synthetic would shift and roll easier in cold weather like near or below zero. Rolling ease has a lot to do with shifting and shifting has a lot to do with ease of movement taking off and getting up to speed. With regular 80/90 in the rearends and 50in the trans it would tend to drag down faster till it warmed up. With synthetic in the rearends 75/90 and synthetic 50 in the trans it would not drag much to take off with it cold. I also have to believe it had to lubricate better in cold weather if it flowed that much easier. The truck now has 1,150,000 on the rearends and transmission now and is still in use on the farm pulling more weight and in more difficult conditions than it ever did on the road. Some times in the 100,000 range to the bin. 85,000 to the elevator 6 axles. I'm not pitching for synthetic nor do I use it other than in those places. I will also if needed put it in other gear boxes if I'm out of regular gear oil. After all a cup is not going to cost that much more in an auger gear box.
 
I had a 1998 GMC V6-4.2? that had 122K miles on it and blew the engine about 2 weeks after I switched to synthetic oil. This truck was never abused and the engine blew at 60 mph while passing. When I pulled over and got out, I could hear fluid gushing out and when I looked under the truck, I saw a very large hole in the side of the cast oil pan and a pile of connecting rod and piston remains. What I thought was water running out of the engine, I suddenly realized was the oil. It was so thin , it looked like water. The mechanic I took the truck to(and ended up selling the truck to) told me he had seen a couple of the GM V6 engines break a rod for seemingly no apparent reason. Upon teardown, he found two rods snapped and disintegrated. The mech replaced everything from the radiator support to the firewall and checked the transmission out and then he gave the truck to his son. The truck looked like brand new, he kept it in a shop and this was for abought 8 years. They put chrome wheels and new tires on it and it really looked sharp. I had to go witness the title signing for some reason.
 


A few of you guys appear to be reneging on your known responsibility as members of YT to oppose anything and everything that is new.
 
(quoted from post at 13:07:37 06/07/22)
A few of you guys appear to be reneging on your known responsibility as members of YT to oppose anything and everything that is new.

LOL, they must be getting old.
 
The way I understand it is they take regular oil and filter out the stuff that makes sludge in an engine and replace it with synthetic materials. I use it in all my vehicles and the newest is 1993.
 
(quoted from post at 11:07:37 06/07/22)

A few of you guys appear to be reneging on your known responsibility as members of YT to oppose anything and everything that is new.

Big thumbs up to you Showcrop.
 
(quoted from post at 15:07:37 06/07/22)

A few of you guys appear to be reneging on your known responsibility as members of YT to oppose anything and everything that is new.

Ha!



This post was edited by Carlmac 369 on 06/08/2022 at 08:53 am.
 

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