I have always used mobil 1 with pretty good results although I have always put in 5w-20 due to the 0w-20 being harder to find. However I recently been informed that the 0w-20 actually gets better mileage. Either way I cant get my usual stuff so am asking what is evryone else using and do you really think 0w-20 makes THAT much of a difference I drive my TC like I stole it w/o any issues except tires every 30k and I get 26mpg usually If I baby it or on long trips I have gotten 29 to 30 mpg this with the 5w-20. So what do you all think?

 

stick with the manufacturer recommended oil viscosity, and i use mobil 1 mainly because it is what every garage i go to offers for synthetic oil changes.

 

I use RP in all my cars, with M1 being my second choice. Technically, RP is closer to a true synthetic oil than M1 is last I read.

 

Why wouldn't you use the factory spec 5W-30, unless you live in an adverse climate (Alaska, Vegas, etc)?

 

I'm not exactly sure but I think "factory spec" is like 0w-20 or like 5w-20 cant remeber basically brown water. Either way I think people switch up because of availablity.

 

I guess I can only speak to the 2005 tC, which is 5W-30.

 

they switched over to 5w20 during 2006 t_dub..

eyah..

 

thanks- that explains it. I never see the 5W-20 in stores!

 

i dunno... i've never had any problems in finding them...

maybe you're just not really looking for it?

 

they say that the thinner oil saves on gas. Its a little arder to find w/ mobile one I think its a green cap. I was olny able to find it at an auto parts store by the quart. I havent noticed a good enough difference to justify the greater cost of the oil which IS harder to find. Not impossible but harder to find. I think I'm just gonna go back to the heavier synthetic you can buy in a gallon jug its considerably cheaper and works fine. Back when the thread started Mobil ONE was harder to find. I had heard there was a shortage on an ingredient they used. I havent had to change my oil since then so I'm not sure if its restocked at the discount stores now (Wal-Mart).

 

Pennzoil Platinum 0W20 for me. My oil analysis shows lower than average wear across the board. Very good oil.

 

http://www.gtrblog.com/index.php/200...for-nis?blog=4

^^

 

i want to try Amsoil cuz there was claims that their better then Mobil 1.

also isnt royal purple owned by mobil o1?

 

I know folks that run amsoil, chance the filter every 5K miles, and only change the oil every 15K. No horror stories yet.....

 

i hope their topping of the oil when they change the filter.

15k is a bit of a stretch. the most im willing to go is about 8k miles. is it me or the engine feels sluggish on old oil?

 

Yeah, seems like a stretch to me too. Maybe it's my imagination, but it never seems to run better than when the oil is fresh.

 

uhh.. i hope they don't top off the oil in the engine...

you know how many quarts it'll take for you to top off oil??

 

heh, all the way up to the oil cap? no idea...

 

mobile 1 5w-30..........