Question about Cars & Trucks
Generally synthetic oil has better all round properties then normal oil! The argument for high mileage engines is that they have more wear in the cylinders and Pistons/rings so will not be as sealed and could burn more oil which would be more noticeable with fully synthetic compared to thicker normal oil! It will depend on how worn your engine is, if you have not noticed any increase in oil usage so far then you should be ok!
Posted on Dec 02, 2014
Best to use Full Syn in all motors-- if you don't mind
the extra price per quart
All the debate & that is all it is- has been going around
for 50 years, on synthetic oils
At 300,000 that motor is done & will use oil regardless
of what you put in it,so the answer is no,the oil has nothing
to do with it
Seems just plain silly for a professional to now after 312,000
to put in synthetic oil,sort of late & just silly,they don't make
money on an oil change they loose money anyway
Posted on Dec 02, 2014
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Posted on Jan 02, 2017
SOURCE: synthetic oil
synthetic motor oil is never a waste of anything some of it is truly amazing how it can protect surfaces and reduce friction. I'd use it. Expensive though.
Posted on Jan 27, 2010
Synthetic oil won't break down as quickly as conventional oil, gives better protection and longer life. Excellent product, I Strongly suggested for those out there who forget to do their oil changes regularly or courier/ work vehicles.
Heres the link to an explaination from Castrol
I use conventional Oil in my jimmy with 5% of Lucas engine oil treatment and service the engine every 3,000 miles. I find it to costly for the Synthetic oil every 3,000 miles, and as for the high mileage oil you can buy. The high mileage oil has a higher fluid retention like adding Lucas engine oil treatment to any conventional oil, so you decide on what type of oil you like to use in your engine.
Good luck and hope this helps.
Posted on Mar 07, 2010
No it will not hurt your engine at all. Actually it will give you a performance boost and a mileage increase.
But, it will also probably cause some leaks that you didn;t have before. Synthetic oil molecules tend to be smaller than their conventional counterparts and if you have any weak gaskets such as the valve cover gasket or the oil pan gasket it will find a way to leak from it. I would try it and if you experience any leakage you can switch back to conventional.
Posted on Apr 09, 2010
Do not use synthetic oil in a motor with that many miles, it will start leaking very bad. Use oil that indicates high mileage type, it has seal conditioners in it. Also, do not use seafo either, it too will cause isues in an old motor. Try to change nothing, again, use an oil that's intended for high mileage motors.
Posted on Nov 30, 2014
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