Which oil to use on G35s?

[WhiteG35Bullet]

My G35 coupe has about 53,000 miles on it and I am not sure which oil to put into my car (syntetic or blend or regular). The owner be4 me told me that the dealership does all of the oil changes for him and he told me that they uses regular but I want to switch to full syntetic or at least blend of regular/syntetic. Can I still switch even though it has been running on regular for the whole 53,000 miles? Or should I just keep using regular oil and which type (10w 40 or 10w 30)? Which oil brand do you guys suggest? I heard Vavoline and Mobil1 are great.

[SVTCOBRA]

I would switch to fully synthetic and use a nissan filter.I use Mobil 1 5w30. Just bought 3 5 qrt jugs at Walmart for $21.95.I change my oil between 3k and 4k miles.Other oils used here a bunch are royal purple and amsoil.

[telcoman]

My G35 coupe has about 53,000 miles on it and I am not sure which oil to put into my car (syntetic or blend or regular). The owner be4 me told me that the dealership does all of the oil changes for him and he told me that they uses regular but I want to switch to full syntetic or at least blend of regular/syntetic. Can I still switch even though it has been running on regular for the whole 53,000 miles? Or should I just keep using regular oil and which type (10w 40 or 10w 30)? Which oil brand do you guys suggest? I heard Vavoline and Mobil1 are great.

Do a search on this topic. Much has been written with a lot of strong opinions.

My G35 coupe has about 53,000 miles on it and I am not sure which oil to put into my car (syntetic or blend or regular). The owner be4 me told me that the dealership does all of the oil changes for him and he told me that they uses regular but I want to switch to full syntetic or at least blend of regular/syntetic. Can I still switch even though it has been running on regular for the whole 53,000 miles? Or should I just keep using regular oil and which type (10w 40 or 10w 30)? Which oil brand do you guys suggest? I heard Vavoline and Mobil1 are great.

http://www.carbibles.com/engineoil_bible.html

Visit carbibles and read about mixing oils. See quote below

"Gaskets and seals! With the makeup of synthetic oils being different from mineral oils, mineral-oil-soaked gaskets and seals have been known to leak when exposed to synthetic oils. Perhaps not that common an occurrence, but worth bearing in mind nevertheless. "

I have almost 43k on my G35. Personally I do not believe in synthetics. I change my own oil every 3k- 3.5 k myself so why spend so much money on an oil that may ruin seals and gaskets that will only be in the engine a short time? I generally use use 5w-30 Pennzoil or whatever I can find on sale. As long as the oil meets manufacture & SAE specs it is fine.Also keep in mind that any internal combustion engine produces contaminantes including condensation moisture etc. Not changing oil frequently enough you may see a white slimy sludge on your oil filler cap.

Just my opinion.

Telcoman

[joe603]

Royal Purple...some of the best oil you can buy!

[DJM AutoWorks]

nissan doesnt suggest to use synthetic in there motors regular oil is best...5w-20 is what i use and my car and my dealership uses it on all of our vehicles that we service...also a nissan filter on every oil change should be used you honestly can beat OEM service parts ex. oil filters, air filters, wiper blades, cabin filters, spark plugs

[SVTCOBRA]

what rationale does Nissan use in advising customers to not use synthetic??My Infiniti dealer suggested going to Mobil 1 fully synthetic at the first oil change. Last time I was in their parts department I noticed stacks of Mobil 1 fully synthetic oil.....I'm not doubting you, just wonder what the official word is and since you are a Nissan tech, you probably have heard it.

Thanks!!!

[Andy_V35Sky_350GT]

Currently using Castrol Edge R full synthetic, 5w40 and loving it.

[TurboDurbo]

nissan doesnt suggest to use synthetic in there motors regular oil is best...5w-20 is what i use and my car and my dealership uses it on all of our vehicles that we service...also a nissan filter on every oil change should be used you honestly can beat OEM service parts ex. oil filters, air filters, wiper blades, cabin filters, spark plugs

The reason the dealership would put that regular oil in is because then your car wears out earlier and you go back to them to buy another one . I think you should definetly be using synthetic or at least a blend. I use Mobil 1 like many others but there are much better oils out there.

[pae9132]

just here to post what I use "Royal Purple w/K&N Gold Filter"

[MagicM]

Mobil/castrol "High Mileage" synthetic.

[WhiteG35Bullet]

OK guys I have decided to switch to full syntetic oil but what will I have to do since the old oil is regular will I have to flush it out or just do an oil change and start putting in Mobil1 exten 10w30 syntetic oil into it?

Also, man two weeks ago I did an oil change and like only half or full quart of oil came out, the ***hole that own the car be4 me not only uses regular but it seems that he didn;t do a oil cahnge for more than 5-6K miles on regular oil! MAD as HELL! That is why my car seems to stall a lil bit when I crank up my motor and hopefully full syntetic will help.

[gldenchld]

i always use 5w30 mobil 1

[ByThaBay]

Amsoil

[soul_hfk]

full synthetic>regular oil

[adren77]

I use 10w-30 fully synthetic Mobil 1 and stock Nissan filter every 3-4k miles. Probably going to switch to 5w-30 now that it's getting cold outside.