Came across this article regarding poor engine design and maintenance leading to oil sludge problems causing engine failure. It mentions many manufactures, but not Nissan.

>>Click Here<<

 

The sludge issue comes from two areas: the engine design and not changing the oil often enough. The SAAB's and VW's listed are turbo cars, and the turbos cook the oil when the engine is shut off, causing a large part of the problem. The Toyota's seem to have design issues that led to small or restrictive oil passages that easily become plugged when sludge forms, and there is also some question about how their filter systems by-pass, making the problem worse.

The turbo issues could be corrected by using a timer that allows the turbo to cool properly before the engine shuts off; but all of the cars sited would benifit from using the correct weight full synthetic and changing it in realistic intervals............................

 

indeed

(I need 15 post so I can ask questions, Im thinking of buying a used Maxima of some sort and want opinions )

 

use castrol GTX and you'll have no worries. i got 200K on mine and no sludge whatsoever.

 

Most of the Manufactures brought these sludge issues on themselves. They were so eager to give people extended service intervals to reduce service visits and increase sales. I've worked for Toyota and VW and can tell you that the people that service the cars at regular and normal intervals do not have sludge issues. My wife also has an 04 SAAB (lease) they use synthetic (mobile 1) and have free service during the warranty. My wifes car went almost 15k before I could get them to service it the 1st time, then went 18k before the second service. If the car was not a lease I would have changed the oil every 5k, will the next owner end up with a sludge car???? I hope not. As for VAG the issue with the 1.8t is due to a combo of poor thinking on VAGs part in design and service intervals. The VAG cars did not come with synthetic and only hold 4.25qt (1.8t) add a turbo and extended service times add up to sludge issues. VAG has gone with synthetic for their new cars but still offer the extended service intervals... service at 5k then 10k then every 10k after that... wtf... the savings of skipping every other service won't pay for a motor at 100K. I change my oil (w/synthetic) every 3k it may be overkill, but my car does lots of short trips in town (5 miles to work) and only about 10k a year, so the added cost of 1 extra oil change a year is well worth it. If you drive alot 20k a year or so and drive extended amounts on the interstate I would suggest every 5k intervals.

 

I need 15 posts