Oil recommendations for high temp 100k plus 4.0 engine

Fishtaco · Dec 17, 2020

So Ok I am running 10w-30 as recommended on here but in summer I live in a pretty hot climate, almost 100 everyday and many days over!

Most aussie Mechanics say 10w30 isn't good enough, should be at least 20w40.

What are recommendations for high temp 100,000 k + engine that I am not sure of previous maintenance.

Also it was suggested on here to use a non drain back filter or something like that but mechanics at work have never heard of it? They are all diesel mechanics by the way.

Not interested in synthetic V Mineral as conventional seems good enough in an 06 or should I fit an oil cooler? At least it gives it more oil.

I get a bit of "Chatter " from the top end at start up but only sometimes and its less than 1 sec but I am not happy with it as that start up is the main damage period.

Cheers

Jerry Bransford · Dec 17, 2020

Stay with the factory recommended 10W-30. The engine is running essentially the same apperox. 210 degree temperature in hot or cold weather. Your mechanic sounds like he knows less about this subject than he thinks he does.

Chris · Dec 17, 2020

10W-30

I agree with Jerry. Your mechanic doesn't know what he's talking about.

Vtx531 · Dec 17, 2020

I don’t think it would make any noticeable difference either way. I would get whatever is cheaper or easy to source in your area or whatever makes you feel more warm and fuzzy inside.

Jerry Bransford · Dec 17, 2020

Keep in mind too that a higher cold starting viscosity like 15W or 20W is slower to circulate throughout the engine when the engine is first started in the morning. That is when engines see the most wear, at the first start in the morning. Which is why some very expensive engines like aircraft engines have electric pre-start oil pumps to get the engine pre-lubed before the first start of the day.

Goatman · Dec 17, 2020

Jerry is right on the money on this. A good 10W is propper. If it makes you happy you might use 10W40 if there are a lot of hard dusty miles on the engine. But if the oil comes out clean with no metal sparkles at oil change time there is no reason to change oil weights.
An easy way to see if your oil filter has an anti-drainback valve on it is to look at the side you screw in. If there is a rubber 'washer' visible through to smaller holes around the stem then you have one. If all you see is into the filter media then you don't.
I'd be suspicious of a mechanic that isn't aware of this. Diesel or not. But Australia may have different ways of doing things. After all, gravity works upside down there!

Jramos013 · Dec 17, 2020

I live in the Caribbean, we get hot weather all year round. No problems with 10w-30. The first number is for winter weight viscosity, it wont matter during the summer.

cpwolf · Dec 17, 2020

Fishtaco said:
So Ok I am running 10w-30 as recommended on here but in summer I live in a pretty hot climate, almost 100 everyday and many days over!

Most aussie Mechanics say 10w30 isn't good enough, should be at least 20w40.

I live in Texas, and there are times that it feels like the face of the sun for months. I run 10w30. If you have a thermostat and gauge.....you can see that your engine runs about 210 (if all is working correctly) and it runs at 210 when it's 105F here or if it's 45F here (I don't know what that is in Celsius ). 210 is 210....

CodaMan · Dec 17, 2020

My temps are as hot as yours. We had 55+ days over 100 this summer and this is what I run year round and have been for years.

KingCarGuyZ · Dec 17, 2020

Down from Texas, pretty hot down here. 10W-40 in the air-cooled VW and 10W-30 in the Jeep. Castrol GTX is my brand of choice, but really it doesn't matter so long as you change it and the filter often. Personally, I have a thing against Penzoil, don't trust them after the sludge trick, but I'm told that is resolved.

JKP · Dec 17, 2020

10W-30 or 10W-40 is fine.

Personally I run 0W-40 in both of mine. 92 has about 300K mi, and the 06 has 220K mi. It flows well on cold mornings and the 40 weight is fine here in the GA summer heat.

If you had a real oil pressure gauge in your 06 you could tell if the oil pressure was lower in the high heat...

My 92 has a real gauge, and the pressure is fine with the 0W-40 year round.

Fishtaco · Dec 17, 2020

This was from my local jeep and 4x4 shop. - "Yes should have 15w oil we use penrite."
Also didnt look at the filter when I changed it, didnt know about anti drain back until it was mentioned in a previous ask about start up chatter.

I put 10-30 in about 8 weeks ago with a new filter no metal or sludge just old black oil, do you have to specifically ask for anti drain back or are they standard on most filters? I ask because I am not sure now if the start up noise was there before I did the oil change, I think it wasn't? people in Auto parts shops have no idea they just point you to a parts number book hanging from the filter shelf.
4x4 shop recommended an engine flush but I am not too keen on that and the reason it hasn't yet gone in for a full service and inspection.
10w30 is not so readily available as other oils in most auto parts shops I have been in so I dont seem to have much choice in brands and cant seem to find a 10w30 High Mileage off the shelf. I have also been looked at as if I am a total idiot for asking for Redline MLT when I tell them its going in a jeep.

JKP · Dec 17, 2020

I'm not sure what brand filters you have down under, but in the US, the filters spec'd for the 4.0 had the anti drain back valve that prevents oil from draining out of the filter which results in lifter clatter on startup. It is the orange rubber piece below. You can see it through the holes in the baseplate.

Fishtaco · Dec 17, 2020

JKP said:
I'm not sure what brand filters you have down under, but in the US, the filters spec'd for the 4.0 had the anti drain back valve that prevents oil from draining out of the filter which results in lifter clatter on startup. It is the orange rubber piece below. You can see it through the holes in the baseplate.
View attachment 211372

I really didnt notice because I didnt know about anti drain back! looks like I am going to do a very early oil change at less than 500 miles then!

JKP · Dec 17, 2020

You can change just the filter, or just pull it and look. Only have to add 1/2 qt or so back.

Fishtaco · Dec 17, 2020

JKP said:
You can change just the filter, or just pull it and look. Only have to add 1/2 qt or so back.

Thanks, oil on dipstick still looks almost as new as when I changed the oil, going to start asking around for an anti drain back filter, I will probably get the same puzzled looks as when I asked about the Redline lol
Our oil come in litres so had to buy 2x four litres so have plenty left to top up if I just change filter.

JKP · Dec 17, 2020

It should look like this. Valve could be orange or black.

Jerry Bransford · Dec 17, 2020

Fishtaco said:
I really didnt notice because I didnt know about anti drain back! looks like I am going to do a very early oil change at less than 500 miles then!

No worries, your oil filter came with an anti-drainback check valve.

Fishtaco · Dec 17, 2020

Jerry Bransford said:
No worries, your oil filter came with an anti-drainback check valve.

So they all come with anti drain back? those pics are not mine, I didnt even look at my filter, sort of wasn't a consideration at the time of change. lol

Jerry Bransford · Dec 17, 2020

Fishtaco said:
So they all come with anti drain back? those pics are not mine, I didnt even look at my filter, sort of wasn't a consideration at the time of change. lol

I haven't heard of an oil filter appropriate to our Jeeps that doesn't have one. Neither have I ever seen an oil filter appropriate to cars not have one. Its purpose is to keep oil present in the top of the engine to help prevent dry starts.

Oil recommendations for high temp 100k plus 4.0 engine

TJ Expert

No Longer Participating

Administrator

TJ Addict

No Longer Participating

TJ Expert

Avatar on an avatar

Texan

California Escapee

TJ Addict

TJ Addict

TJ Expert

TJ Addict

TJ Expert

TJ Addict

TJ Expert

TJ Addict

No Longer Participating

TJ Expert

No Longer Participating

Similar threads