I'm not sure if actually read the article but it is the opposite, it debunks the myth that low ZDDP levels are acceptable. Who's had failures... do you read any of the classic chevelle, mopar, olds, etc boards,?

 

.Oil test are very useful. you get tons of info, and if you do one now and another say next year it wioll give you a good idea of what your oil and engine is doing. You need more thatn one so u can compare. Most people donrt get their oil tested and talk about how great or how bad brands of oil are. If your not testing your theories of what your engine likes it is BS. Get it tested you will be suprised. BTW I change my oil every 25k or 1 year with oil test in 5 different cars even my trail only xj. 25k is normal use i consider a few of mine harsh and still pass 25k test with no problem no issues. 242k on the xj,268k on a 91 corolla , 237k on a 3.4 4runner and 150k on a trailblazer.

 

.......and every one of those boards are full of goober, 1st time, so called, engine builders/assemblers, when actually they are clueless on how to properly assemble/break-in a new motor (especially a potent one) and have wiped a lobe off a cam.......and blame the oil.

 

A big deal based upon what.....opinions posted from some forum? If anybody needs to have oil samples drawn and tested, it should be someone that owns several classic cars. Read Motor Oil 107 by Dr. A E Haas, too much ZDDP can for sure cause problems. If you're adding ZDDP, how do you know what the concentration is........maybe too much?

 

I've got into this debate ( argument! ) on every motorcycle forum I've ever been on, and it always comes back to what someone likes, or thinks, and they are not changing.
For the guys using their Cherokees for DD if you put allot of miles on extended oil changes are great. Once upon a time I was driving a little over 5000 miles a month for work. I used a synthetic and changed it every other month.
I plan on basically using my Cherokee as a trail machine and not putting that many miles on it in a year. ( where I live I can be on a mountain trail in 3 miles ) I will probably drive it 4000-5000 miles a year. I will use petroleum oil because I will change it in the spring and in the fall, mostly so I can look at it twice a year and catch stuff before it has a chance to break and cause me serious problems. ( $$$ )

 

exactly, you need to be able to compare the 2. I havent had one done yet because i dont have all that many miles on the oil i have in it. I know my dad did a oil analysis test i think every time he changed his oil filter (was also running dual bypass filter system) He had a collection of all of the tests that he showed to the new owner of the truck so he could see whats happening internally with the engine. I plan to do one soon, and every couple thousand miles just to see if anything is wrong or is starting to go bad.

 

yeah, they got tons of info. I do mine about once a year cause i run 25k or a year on mine. I have backed off every year now cause nothing is changing. My last one they busted me for running my air filter to long. i had some abrasive numbers that went up some.

 

What oil are you running? Amsoil?

 

That's just a rumor. Valvoline MaxLife is good to a 94 cherokee sport. I always using it every time I change the oil of my cherokee. Don't mind them.

 

Do you use synthetic or conventional? 25k mile oil changes is ridiculous, I change mine (along with my dad and brother) every 3000 miles.

 

Mobil One is superior to any oil I have ever encountered, bar none.

No offense to Amsoil users...I use it myself when I can buy it cheap...but Mobil's R&D budget is larger than Amsoil's entire company.

The oil companies - the "seven sisters" - know more than anyone else about oil. They even know more than Obama...and he knows everything.

 

Nobody wants to spend 20 dollars on a test that will tell them more about their engine and oil than they know how to read. they are very valuable. i get my oil tested so i know whats working. Mydaily driver gets about 30k a year put on it. i change my oil every 25 Thousand miles. I have it tested and it comes back ok. it is near the end of its life but working, not to mention all the metal wear info,and abrasives, water in oil, fuel in oil and so on. My trail jeep is a 88 xj with 241k on it, i swapped it over and its fine no leaks.
You cant look at, feel, smell or taste you oil to see if its working.
Hell i got busted cause i ran a air filter alittle long, they busted me on abrasives.

 

I run Amsoil 5-30 in everything with an Amsoil filter. I send it off at 25k and get it tested. it comes back still working but getting near the end of its life. I have a 97 4runner with 238k and it almost doesnt use a drop during those 25k, i got a corolla with 270k, i change it every 10k, cause it had a bad head gasket and water in it and i havent had it tested to see if ALL the water is gone. 3000 mile oil changes are ridiculous these days even on conventional oil, it is better than it used to be.
If your not testing you cant say what oil works, kinda like voting. If you dont vote dont *****

 

DONT DO IT!!! I did that on accident with a car of mine. My car never ran the same. Its a bad idea because the snythetic has detergents and cleaners in it that wil get your eagine squeaky clean on the inside. Thats good on new engines, but on old engines its bad because burnt oil residue seals like a glue in any areas you might have weakspots. I had a buddy that took a class on oil and he thinks the same. Just think of it a an extra cushion. Besides synthetic cost more and I think its all a gimmick anyway. Stick to whats worked for over 100 years. Put some Lucas in it next time you change your oil. Sooner the better. Good Luck.

-Keep on Truckin'

 

Hate to break it to you bud, but the same detergents and cleaners that are in synthetic oil are in conventional oil as well. If a lubricant can clean your engine enough to expose the seals, i'd say that's a really good thing. If the seals leak, the obvious solution is to replace the seals because they were not working in the first place.

If you compare the same grade oil in both a mineral oil and a synthetic oil,
the synthetic lubricated engine will turn over easier. This has the effect of using less power from your starter motor. It will last longer. Your battery has less of a current draw. This will also last longer. The battery was discharged less during the start so the alternator will rob less power from your engine to recharge. The alternator lasts longer and you get a little better gas economy. The synthetic oil also does not require the VI friction modifiers that mineral oil requires (they break down faster than the oil itself), thus it can last longer run cycles. The only downside of synthetic lubricants is the cost.

Additives are a big no no as well. The oil companies and engine manufacturers work together very hard to give you the product you need. There is a lot of competition to get us the best working motor oil. Independent additives cannot make the oil better and in many cases makes things worse. There have been engine failures as a result of adding some of these aftermarket additives to motor oil. Yes, even the famed lucas.


I encourage everyone to read this article, it's extremely thorough:
http://www.bobistheoilguy.com/cms/in...=article&id=84