Stupid engine oil question

[Rhinopkc]

Are you freekin' Nuts!?!?!?!? If you have run a motor on conventional oil for most of its life, never go to synthetic! It will have adverse effect on your engine. The gaskets and seals conform the a certain kind of oil and if you switch oils, your engine will leak like crazy. I highly recomend not using synthetic unless that paticular motor was raised on synthetic or it has very little miles on it.

What is the breaking point? How many Dino oil miles is too many to switch to synthetic? Where did you get this information? I can tell you from personal experience, I switched 2 engines one at about 75k and one at about 150k, no troubles with either one. One was a 6.5 turbo diesel one was a 383 SBC. Both engines were maintained very well, so maybe that has something to do with it. I still have the diesel, it is my DD and does not leak a single drop of oil (the oil cooler lines were leaking , but were replaced before I switched to synthetic).

 

[chevyk2500hd]

I will only switch motors oils if under 1000 miles or so. Or if you don't mind the leaks and seal changes in the motor switch whenever you feel the need.

 

[Rhinopkc]

What leaks? Switching never caused any leaks for me.

 

[Russ]

I guess I have been lucky also as I have switched oil numerous times on cars I have had over the last 30 years with no problems from leaks or seals. My little car I drive back and forth to work every day gets whatever brand or weight of oil I happen to pick up for it at each oil change and is still leak free after 110K.

It is probably not the right thing to do, but I have never seen any problems from it.

Russ

 

[Chevy305]

This was a topic covered on another forum a while back and one of the members had a link to a site that explaned all what I'm trying to say in greater detail. I wish I could remember the site.

 

[muscle]

if it was low on oil then you really need to keep an eye on the level for a while because synthetic has a tendency to burn more and leak more than dino oil. You should also strongly consider flushing the engine first to remove the conventional oil out completly. A safe and cheap way is to pour a couple of quarts of kerosene in and let it idle for about 20 minutes. Only do that if the mileage is not too high and it has been maintained properly. If not sludge will all go the bottom of the pan and clog the pump screen. I maintain a fleet of 40 trucks and pieces of equipment and run sythetic in everything from a honda 5.5 to a Mack truck.

is there a better way to switch to synthetic? I mean after breaking in a new engine?

 

[84gmcjimmy]

Well, how can I flush out all the synthetic to put in new regular 10w-30? Do I just change the filter and drain oil or what can I do?