Oil and oil filter reccomendations.

[Hajile]

i got a 95 KA and with 83,XXX miles on it. i ususally put castrol gtx high mileage cuz its reccomended for vehicle over 75,000 already and i use fram high mileage oil filter to go with it. i wanna try something different and looking for performance somewhat. what would you guys reccomend ???

[garetcurry]

I just changed mine and put Castrol Full Synthetic in her, used a Fram "Heavy Duty" or something oil filter. Just food for thought, I use only Castrol oil and K&N Oil Filters for my bikes.

[Hajile]

is it worthless putting synthetic in a truck with 83,000 miles ? or smart ? or it dont matter ? ha

[JRock]

i always buy mobil1 full synthetic when its on sale. advanced auto parts has a sale every few months, 5 quarts and a filter for like 30 bucks.

[JRock]

ps yes its absolutely worth it.

[pugz]

use mobile 1 full synthetic and a factory nissan oil filter... they have a check valve in them that helps keep oil in the motor and prevents ticking in the motor

[Hajile]

mobile 1 full synthetic it is, and ill think about the factory oil filter. is napa filters any good ?

[pugz]

nissan filters are only like 7$

[Hajile]

okay mobil 1 synthetic and facotry filter it is. thanks pugz, oh and eveyone else.

[mini702]

nobody mentioned the 1 issue with synthetic... it's a smaller molecule and tends to leak from worn seals and in older cars.
Should be fine but don't be suprised if u notice new drips.

[burrsg101]

i never had any leakage problems and i use amsoil in all my vehicles, and my old dsm that i put it in had 230k on it with no problems. Amsoil imo is the best oil you can buy

[sparkinframe]

check valve in oem... and only 7bux, im sold!

[garetcurry]

Wikipedia has an advantage/disadvantage part on synthetic oil (http://en.wikipedia.org/wiki/Synthetic_oil):

Advantages


The technical advantages of synthetic motor oils include:[citation needed (http://en.wikipedia.org/wiki/Wikipedia:Citation_needed)]

Measurably better low and high temperature viscosity performance
Better chemical & shear stability
Decreased evaporative loss
Resistance to oxidation, thermal breakdown and oil sludge (http://en.wikipedia.org/wiki/Oil_sludge) problems
Extended drain intervals with the environmental benefit of less oil waste.
Improved fuel economy in certain engine configurations.
Better lubrication on cold starts
Disadvantages



The disadvantages of synthetic motor oils include:

Initial costs are usually two to four times greater than petroleum-based oils, though at one time, man-made oils cost ten times more than petroleum[citation needed (http://en.wikipedia.org/wiki/Wikipedia:Citation_needed)]. Initial costs are often mitigated by extended change intervals, which individuals may confirm through used oil analysis (http://en.wikipedia.org/wiki/Oil_analysis) (UOA).
The lower friction may make them unsuitable for break-in (i.e. the initial run-in period of the vehicle) where friction is desirable to cause wear. Improved engine part machining has made break-in less critical than it once was though. Many modern cars now come with synthetic oil as a factory fill.
Potential decomposition problems in certain chemical environments (industrial use dominantly)
Potential stress cracking of plastic components like POM (polyoxymethylene (http://en.wikipedia.org/wiki/Polyoxymethylene)) in the presence of PAOs (polyalphaolefins (http://en.wikipedia.org/wiki/Polyalphaolefin)).
Potential on some older pushrod race engines with roller lifters (http://en.wikipedia.org/w/index.php?title=Roller_lifter&action=edit&redlink=1) for the roller itself not to spin with camshaft (http://en.wikipedia.org/wiki/Camshaft) movement, but rather slide while the roller itself remains either stationary or at a lower circumferential speed (http://en.wikipedia.org/w/index.php?title=Circumferential_speed&action=edit&redlink=1) than that of the camshaft lobe[citation needed (http://en.wikipedia.org/wiki/Wikipedia:Citation_needed)]
In July 1996, Consumer Reports (http://en.wikipedia.org/wiki/Consumer_Reports) published the results of a two year motor oil (http://en.wikipedia.org/wiki/Motor_oil) test involving a fleet of 75 New York taxi cabs (http://en.wikipedia.org/wiki/Taxi_cab) and found no noticeable advantage of synthetic oil over regular oil[3] (http://en.wikipedia.org/wiki/Synthetic_oil#cite_note-2). In their article, they noted that "Big-city cabs don't see many cold start-ups or long periods of high speed driving in extreme heat. But our test results relate to the most common type of severe service - stop-and-go city driving." According to their study, synthetic oil is "worth considering for extreme driving conditions: high ambient temperatures and high engine load, or very cold temperatures." [4] (http://en.wikipedia.org/wiki/Synthetic_oil#cite_note-3) This research was criticized by some because most engine damage appears to be caused by cold starts, and their research method may not have included enough cold starts to be representative of personal vehicle use.[5] (http://en.wikipedia.org/wiki/Synthetic_oil#cite_note-4)
Especially synthetic base stocks help to improve ashless engine oil formulations both for passenger vehicles(PVL, CVL) and heavy commercials engine oils (HCVL, HHDO) and especially for new generation combined cycle type power generator gas engines.
Synthetic base stocks, inside the engine oil formulations, decrease the emissions, increase the catalytic converter life with their low ash & zero sulphur properties and especially their low evaporation rates (Noack volatility values)

[98pacific_frontier]

castrol GTX and a factory nissan filter youll never have problems guarantee.

[97xenissan]

Ok so if i put synthetic in my truck can i switch back to conventional

[Hajile]

^^^^x2

[yeti_'87HB]

yes you can but if you ahve more than like 20,000 on a motor, its worthless to put synthetic oil in your engine. its something you do when you get a new car. you do it at your first oil change and either do it for the life of the engine, or you can change back at any time. you should do an engine flush before you switch. its a chemical that you put in your engine and run it for about 10 minutes, then drop the oil and you'll be fine. mini702 said it right, synthetic oil has a smaller molecular structure than conventional, and your engine having 83K+, it has worn with conventional in it. changing to synthetic will actually worsen performance, you may notice a little leakage when you may not have had it before. another thing that will more than likely increase is the amount of blowby and oil comsumption in your engine. you may also notice some vibrations, ticking, or some other noises because everything has worn with conventional, which takes up more space that synthetic. and just to explain that, a 10w30 synthetic and a 10w30 conventional have the same viscosity, but because of the differences in the molecular break down of each, it will increase clearances in your engine...to sum it up, go with castrol GTX high mileage, toss in haf a bottle of lucas oil stabilizer and go with a factory nissan filter that has the check valve and youi'll be good to go...

and if there is anyone that will queston the use of lucas oil stabilizer, heres my example/argument in favour of it. I have an '87 Z24 with 190k+ om it, it was leaking enough that i would be down a litre within two weeks, i put a full litre of lucas oil stabilizer(one full bottle), and after a week of driving(the bottle says it will take about 300kms to take effect) it sealed everything up and my engine hasn't leaked since. i actually use 100% straight lucas oil stabilizer in both my tranny and my diff and it runs as smooth as butter. i actually found it to increase torqueand power to the ground, much smother shifting, and a bit faster acceleration

[Nein7Oh]

I recommend Mobil synthetic oil and mobil filters.

If you are interested in the differences you can check out: http://www.knizefamily.net/minimopar/oilfilters/index.html

They bought and cut apart just about every filter available on the market. FRAM is pretty much junk, including the high mileage one.

[OLDSCHOOL]

350000+ miles mobil 1 and I use a mopar 1090 filter, worked for dodge and I ended up with a case

[97_hardbody]

yes you can but if you ahve more than like 20,000 on a motor, its worthless to put synthetic oil in your engine. its something you do when you get a new car. you do it at your first oil change and either do it for the life of the engine, or you can change back at any time.

i've always understood it as since the molecules in synthetic were smaller they actually lubricate more of those parts in your engine. and i was also advised that once you go synthetic you shouldn't go back to conventional. anyone read the performance pages in one of the recent minitruckin mags?? they did a few tests comparing conv to synt in a taco i think usin royal purple...

[Hajile]

i forgot all about royal purple...

royal purple vs. mobil 1

whats better ???

[97_hardbody]

they are both synthetics...performance should be about the same. i do kno that rp costs a lil bit more. i've been changin my own oil recetly and usin mobil for the past 20k. used to go to the 5min oil change shops b4 they shorted me a quart in the engine....