Weird, I searched and did find a thread like this already...

Anyway just got an '08 LE5 and was wondering what you use. It already has 449 miles and I plan on swapping out the crappy factory oil soon.

I always used RP on my Z32 but I was thinking Castrol Syntec since i dont plan on racing/driving fast. Plus I wouldn't have to mail order it lol.

 

Synthetic oil is a waste of money in these engines. Stick with a good-quality, conventional 5W30 oil and you'll be fine. If you plan on boosting it, then you could look at forking out the money to do synthetic oil, otherwise you're just throwing money away.

That said, I'll be changing over to Mobil 1 for my next oil change in preparation for my M62 build.

 

so if you want it to perform better with speed synthetic is the way to go?

 

Synthetics don't break down as quickly from the added heat as conventional oils do.

 

I used to use regular 5w30 stuff. But I've been running synthetic since I started boosting

 

Synthetic Always. Mobile 1 for me. Used it from day one in my 2.2L sedan then when it was boosted as well. 77k with not one problem 30k on boost

Same with my LNF. Mobile 1 since day 1. will never change.

 

tried royal purple for the 1st time. its pretty sexy. i like this oil

 

I really wanted the castrol edge, but they don't produce it in 5w-30....ill probably just go with mobile 1

 

i use mobile 1 although i herd royal purple is good

actully the guy at the dealer recomended me it and showed me pics of his racing boat when he had problems with it and he said royal purbple saved the block

 

its hard to find but one of the advanced auto's had it for the same price as mobile 1 extreme so i tried it. its a cool oil. its literally a purple oil so when it goes in it almost looks dirty since its a dark purple and not clear like normal oil. But it does seem to be a bit smoother

 

Oh wow, really? Just saved me some money. And here I am with crappy regular dealer oil cause they screwed up, annoyed that I don't have synthetic, when I've been fine all along! Except for the fact its crappy dealer oil so who knows what brand they used. Thanks!

 

mobile 1 synthetic high performance.

 

Dont listen to him, synthetic is not only for racing, thats the dumbest thing i have heard. Its used to help clean the gunk and **** out of the motor, i immediately noticed my motor ran smoother after going over to synthetic

 

Dont listen to illini, synthetic is not only for racing, thats the dumbest thing i have heard. Its used to help clean the gunk and **** out of the motor, i immediately noticed my motor ran smoother after going over to synthetic

 

Ok now I'm confused which is the right answer

 

always better to go synthetic if you can afford the extra couple bux every oil change. your engine will love you. but once yous tart using synthetic you cant change your mind and cheap out down the line. you have tos tick with it

 

Yes, you can run synthetic oil without ever wanting to make more power, but all you're doing is doubling your cost of ownership. It's the same as running 93 octane when your car only requires 87 octane. If you run a good oil and change it frequently, you're not going to see any issues with a conventional oil during the life of the car.

 

Synthetic is better in ALL applications. It lasts longer, it can fit into smaller places, it lubricates better, it reduces "engine gunk" and reduces our dependancy on forgein oil (Made in a chem lab in the midwest vs. dug from the ground in middle east)

Synthetic is so much better because it was chemically engineered specifically to do the things I listed, where conventional oil is natural (well, kinda) and just happens to do an ok job at lubricating IC engines.

And you CAN go back to conventional oil after you go synthetic. They mix perfectly fine together, as they have similar chemical properties, other the the differances I stated above.

And its actually not more expensive. Do the math, which is cheaper, $2.50/quart changed every 3000 miles, or $5.00/quart every 15,000 miles (which is the recommended life of RP and Edge oil)...

Synthetic > Conventional on all fronts.

 

I am not going to wait 15k miles before i change my oil... thanks anyway though.

Yes, it is that much more expensive.

You do not NEED to run it. It is not going to help performance. considering my dad has 115k on his dodge with conventional oil... if your using it for a daily driver, non boosted... there is no reason to use synthetic....

 

News flash: That "sludge protection" is just a detergent added to the oil and it's present in the conventional oils as well. About synthetic being smaller and being able to get into tighter places, the tolerances on IC engines aren't so tight that they require that kind of lubrication and ***********. $5/quart is a little low for a synthetic. You're probably going to be looking at closer to $6/qt for a 5k mile blend.

 

larbatory research > ricers making assumptions based on absolutely nothing

 

Hes not making an assumption... hes putting up valid info...

You do not need to put synthetic in a LE5... only if you decide to put some boost on it... no ifs ands or buts..

 

I'm not going to deny that a synthetic will be able to penetrate better than a conventional oil, but the fact is that IT IS NOT NECESSARY TO RUN SYNTHETIC ON OUR ENGINES UNLESS YOU RUN BOOST OR CAMS.

 

nobody is saying its NECESSARY to run it, but it is better for your motor to run it, its just an all around better oil, that's just fact. These are high compression motors that also are supposed to run on premium fuel, so why cheap out on the oil

 

The same reason why they didn't put 2" diameter axle shafts in them or use the same tranny as they use in the MC/SS/SC, because it's not going to affect the life of the vehicle beyond its expected life and would just increase the cost of the vehicle and of maintenance.