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Synthetic oil?


BobbyD
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:huh: I have ran a search and nothing really convincing came up on this topic, so I must throw it to the masses again. Does synthetic oil work well in our vehicles? They have some really interesting synthetic oils out nowadays! I have 121,000 miles on my Pathy. Need to know if synthetic would be worthwhile using? 1995 SE-V6 Pathfinder. sssh
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I think it really depends on the oil weight being used.

Most of the current synthetics don't cause leaks like they used to a while back.

With your mileage, you might want to run an engine cleaner like AutoRx first to clean it out first and then start running a synthetic.

Synthetics are relatively inexpensive now and to me, the advantages outweigh the cost, expecially if you plan on keeping your car for awhile.

Regarding AutoRx, do a general search and you'll find tons of positive comments about the product on many different forums not specific to Nissan.

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autorx, lol. what a joke. whats that, a special name for atf or diesel fuel that comes in a pint container with a 15 dollar price tag?

Before you make fun of a product why don't you check it out first?

Sheesh, what happened to all the constructive comments that used to be posted here before?

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Folks, actually, as good as synthetic are deposits may still form, although not as bad as if you used cheap oil or disregarded changing oil regularly.

BMW's are famous for having a valve tick from gummed up hydraulic lifters and various cleaners have proven to solve this problem by removing varnish and carbon deposits.

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I've been running 5W 30 Mobil 1 since the first oil change some 16 years and 175,000 ago. No leakage, no burning and from what I can see in side the valve cover at oil change time it appears to be whistle clean.

 

I had a slight consumption of oil back 10-12,000 miles ago. I SeaFoamed my motor and the consumption stopped. I'd say my valve guide seals are reaching the useful end of their serivce. Still runs like a top and knocks down 18-20 mpg with mixed driving conditions. Not to shabby for a 16 year old daily driver.

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Synthetic oil is better. As mentioned, it will show more leaks than with a conventional oil.....though does not CAUSE them.

 

If I thought, with ~300,000kms on my truck, that synthetic oil wouldn't leak out all over the place, or into the combustion chamber, I'd switch over as well.

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I run 10w-40 high mileage in my 1990 with over 230,000 miles on it and it seems happy. no burning and no leaking. Changed every 3,000 miles. the usual lifter tapping for a few seconds at cold start up but thats typical for these engines at that age so I dont worry about it.

 

Redline synthetic in the gearbox and rear end. Standard lube in the front differential since it is rare that I actually put it in 4x4 mode...until I find a good mud hole around here :)

 

-Chris

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