GI-Jeepin'

It's possible that the front is lower than the rear by that much.

No4x4Yet

I added a crank scrapper on my mustang, dropping the pan a 1/4". After some calculations I found out that that 1/4" added bout 1/2 a quart capacity.

One oil change a year? That not so good. The lift could definitely make the difference. Change your oil and pour the old in a clear container. If there is anything in the oil it should separate and you will see something else in there.

pwb

I have used it only 600-700km since the last oil change. I will try to change it again in the weekend. Could i use low cost mineral oil, last i used half syntetic.

GI-Jeepin'

They say it is unwise to mix Synthetic and Mineral based oils. Once you go Synthetic, you really can't go back, unless you do a complete rebuild and clean all parts thoroughly.

pwb

ok?? I thought that only was a myth. I have always been told that all engine oil can be mixed, but syntetic oil with mineral oil will get the effect of mineral oil. As long the oil has the correct spesification.

No4x4Yet

Who says its unwise? Kinda defeats the purpose at the least. Nothing wrong with goin from synthetic

The idea thats its bad to switch back to regular oil comes from the days when synthetic was new and it did cause an issue. Oil seals woudl swell differently with synthetic than conventional. Just like you dont need to change your oil every 3k miles anymore cuz oil improved. Switching back shouldnt be a issue. I wouldnt jump back and forth again and again though, just to be safe.

GI-Jeepin'

Your Jeep, your engine, your choice.

No4x4Yet

Im not saying your wrong but Im not taking the words of someone I dont know online, thats how rumors start. You could be a 14 yr old punk just stirring things upfor all I know. I researched the issue as I stated. Technology changes and improves over the years and from what I can tell the issue has been addressed. If Im wrong please educate me with some facts. I have no problem learning something new.

GI-Jeepin'

Ok, lets get this straight, i am no lilttle punk by any means. I am 39 with 21+ years on active duty in the Army and im still in. Now for 15 of those years i was a turbine mechanic on M1 tanks. I have also been heavily involved in drag racing since i was 9. Lately, i have been wrenching on friends short course off-road racing trucks. I like to think that i know what i am talking about. What i told the OP was that its unwise to mix or go back and forth, not impossible. Ultimately, its the owner's choice, hence your jeep, your engine, your choice. No facts required, it is simply your choice.

Dwestonxj

GI-Jeepin you just owned that guy.. Thanks for your service

dacr89

Owned! Also I agree with GI he was simply stating what he has delt with. In the end it is the owners choice. I do agree with him on switching back and forth. I have always been taught that mixing conventional and syn shouldn't be swapped out back and forth. My mechanic told me that once you go full syn it is best to stick with that. If you run half stick with half or go to one or the other. However it is the owners choice in the end.

pwb

But its still only a myth and personal belives and there isnt any documentation on why not to do it?

GI-Jeepin'

Synthetic oils are manufactured so that their molecules are of a finer grade and are consistent in size. This is what keeps additives like detergents active for far longer than mineral oils. This is the reason why high reving or ultra high compression or Turbo Charged performance engines require synth oil.

Now, Mineral oils are pumped from the earth and after the refining process, the molecules are inconsistent in size, this can't be helped. This inconsistency is what leads to the breakdown of cohesion between the base oil and the additives. It is this inconsistency that requires users to change their oil at regular intervals. Also, on high mileage engines running with high mileage mineral oils, sludge and dirt deposits will gather at 90 degree corners in the oil galley's and around seals that have areas that hold and trap deposits. When this oil is removed and replaced with Synthetic, it's modern, more effecient oil detergents and other additives will eventually remove and or loosen these deposits. The results "MAY" lead to oil leaks or seepage due to the finer grade of molecules in the synth oil washing away the deposits in and around the seals. Synthetic oils have come a very long way in recent years, but mineral oils have not progressed as far. It is a fossil fuel. You can stuff all day long and it is still a fossil fuel.

Of course, you may get lucky and have no ill effects when you make the change, then again..... It's a gamble we all take when we change something on our vehicles, whether its a jeep or a bicycle.

So, PWB, to answer your question, No there is not any documentation that says you cannot do it. It is your choice. However, you live in Norway. I have never lived anywhere near as cold as what your winters are like. If it were me and I lived in Norway (that would never happen though, I am from Puerto Rico, shopping in the frozen food section is a winter sport where I from!) I would run full synth because of the cold. Synth oil is less effected by the extreme temp change that occurs in an engine in cold climates. Your engine can go from -15 F to 240 F in a matter of 15-30 minutes. But thats just me.

pwb

This winter has been very warm, all snow are gone :-( I dont know what the prev. owner has used, but i think i stick to half synth. and maybe full synth. if it gets cold.

GI-Jeepin'

ok, just monitor your engine as you drive it after the oil change. good luck