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How can you tell if my engine oil is either...


Carl_S

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Thats not strictly true

 

You could send a sample to a lab and have it analysed but it will cost more for the test than new oil and filter costs, so it is possible just not financially viable.

 

Costs £15 for an oil analysis ;)

Problem is that it only gives resuls of the chemical makeup of the oil & the wear metals in it. What it would be able to tell you is if the oil is protecting the engie well or not.

 

Used oil would be difficult to determine which brand it is due to the characteristic additives being depleted by use. Also the lab would have to trawl a database of new oil results in an attempt to match it exactly.

 

I have only been able to do it once, and I was lucky as I had a result from the same brand of oil to compare it to which is unique (Duckhams IIRC).

 

Still better off draining & refilling with a good oil if its that much of a issue.

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Ah but we aren't trying to tell what brand it is just if its fully or semi synthetic. That has got to be testable if you can count the exact parts per million of every item in the oil.

£15 though you say for a decent oil analysis test? Thats actually very good. Is it spectrometric? Do you do profiling with wear advice or just provide the oil contents printout and leave the rest to someone else?

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Have a look for a post by opieoils. There was a very good technical thread regarding oil a while back.

 

http://www.mkivsupra.net/vbb/showthread.php?t=110863&highlight=opie+oils+synthetic

 

Cheers seen that one before.

 

Taste it......;)

 

Tee hee :)

 

Thought that was for anti-freeze in oil? :blink:;)

 

You tasted your antifreeze before then blackie?!

 

Drain it out.

 

Fill with either semi synthetic or fully synthetic.

 

Job done.

 

Yeah thats what I had done in the end. Didnt know that they could be slightly mixed.

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