I have 122,000 on my truck and I was thinking about switching over to Synthetic engine oil. Are the miles to high to switch over? I am a little nervous and I am not sure why.. lol

Slim

 

Shouldn't be too high, just did mine at 94k, only thing you might see is leaks as the stuffs kinda slippery!! Are you set up for it ie: extended drains/filters etc... might wanna do a search and see what everybody else is doing as the synthetics kinda pricey to be dumping down the drain every 3-5k......

 

I started running synthetic at 135k miles. Just got my first sample results and it says too much lead (10k miles), so I need to change it and check again at 5k miles.
I also have the bypass filter, and IMO it's not worth going to synthetic if you don't do the bypass, too.

 

hows the bypass worth it if you can't go to 10k miles on the oil? thought the point of the bypass was to be able to run 10k+ miles on the oil??? just wondering b/c i've never considered running one.

 

If it starts leaking after you switch then it was something you needed to fix anyway.

 

well, if things are good, you can run 10k+
But, high lead on the sample doesn't mean its the oils fault.

I'm sure there are other factors in there as well.

The bypass helps clean the oil, synth or dino.
They are good either way IMO.
Unless you are doing 3k oil changes, i'd be running some home brew bypass system with a cheep napa filter.

Pluss like previous discussions. You dont get full benifits first change.
I dont think i'd run 10k on my first synth change. To many other things left over.
They say the detergants are the same, which could be, but synth is a bit smaller.
I think it gets in and roots out some sludge that dino oil doesn't. Then this stuff goes mixing around in there, and the bypass wont pick it all up. cause it only does a percentage 10-20% oil per pass around, which eventually it will catch all, but its a bypass, it goes there on free will sorta deal.

So, jim's high lead reading coulda been from old oil from Previous oil changes, that never came out.
Pluss think of all the oil sitting in the engine, hpop and stuff you can't get out.
The only way you could get allt hat out is to flush with some sorta thing like keroseane, (sorry not doing that one) or to go a short OCI on synthetic to help get the rest out.
I am brave enough to pull the relays and the fuses to stop it from firing, and turn it over after my first Synth run at 3-5k miles and try and pump the oil rails out and whatever is left.

I'm personally trying to come up with a bypass system that will work for me that will allow a higher amount of fluid in the system, which will increase your life span of the oil, more oil is harder to break down sorta idea.
And if i change the bypass filters, then i'll have almost 3qt's or more to add to the engine.

I'll have a huge write up on all of this sometime next month when I do go all though with it.


I am going to talk to some others on synth to dino relations and stuff, and why one is better than the other, this info will be included in there as well.
I'd hate to tell people to put it on hold.
but, my personal thought at the moment is, snyth will not cover up your leak problems, but tell you where your weakpoints are by leaking there.
If you need new IPR nut and o-rings, or your turbo has a slight leak you never seen, or need new oil pan. yada yada.
I'm scared on the oil pan one, my seaps a bit.
Might just need a tighten up.
That, or i'll cut the cross member like others have suggested. (yea, i'ma call you on that one travis)

 

No problem swiched between dino and Syn. I have gone back and forth probably 3 different times. But I will put my 2 cents in on extended oil changes. THIS IS A PSD it uses oil to fire the injectors which you all know. Bypass filters are a great thing but I do not believe from my personal experience that extended (over 5,000 miles) is a good idea. The oil thins too much and can cause driveablility issues. If you are going to extend oil changes oil analysis is a MUST and make up oil is a needed to keep viscosity up as well as the anti foaming additives. Care and attention must be taken to ensure your oil is still holding up if you are going higher than 5k on oil changes.

 

YEa, that was my tought with big filters for my bypass system tim.

When I do a filter change, the oil I'll have to add back will help keep viscosity up and get some more additives back in the oil.

 

YEa, that was my tought with big filters for my bypass system tim.

When I do a filter change, the oil I'll have to add back will help keep viscosity up and get some more additives back in the oil.

 

Oil changes are more about the condition of motor, tune on motor
and how its heat cycled.
The heui is harsh on lubes.
The IH T444E holds 20% more oil than the PSD.
The IH spec is 10K on dino with no bypass filter.

Bill

 

If your oil pan is leaking and you have a stick shift then you better pull the clutch cover off and have a look at where it rubbed through the pan. I just siliconed a 2 inch long gash in my pan from the clutch cover.

Don't cut the crossmember. It is there for a reason and you will regret it later.

 

That is true Bill. I tend to be hard on my truck. I drive it like I stole it, always in a hot tune and short warm up times and short commutes. Kinda hard on oil and motor and .......

 

no oil pan wear, thanks for concern RRanch.

Yea. I understand what you guys talkin about.
Thats why with bypass I'm trying to get most total oil increase I can to help with that.

I have a few before samples here i've taken, and i'll need blackstone to send me like 4 kits for oil analisis. And then I'll start testing often on the truck after new setup.
Looking like it will cost me around 350 unless i can find them cheeper.

 

Travis,
This was my first time using synthetic and everyone told me the first oil change would be cut short. I sent the sample in at 10k miles and it came back with almost 5 times the normal lead content. They said high lead means bearing wear, but with all other paramters well below spec, they said it's probably something else that tainted the oil and just change the oil and test again in a little bit.

I agree 100%.....When talking about regular oil. Actually, IMO if using regular oil you should change it no more than 3k miles.
But I've worked on enough injectors that ran synthetic (it's easy to tell and I ask the customer about it) to make me want to give it a shot. Even extended oil changes with synthetics the injectors are always in better shape than regular oil with normal changes. Thought I'd try it for myself, so we'll see....

 

Agree that the syn outperforms the dino when it comes to the heui
inj. Also believe (results not complete yet) that the heui inj system
perfers 30wt oil. As of now we have 120k on a set of inj's with 30wt oil.
A quick test of the poppets show .0035 to .003
The inj's are oem ab splits (uncoated).
This truck also has alot of idle time on it.
I should have put and hr clock on it but never got around to it.

.02
Bill