Banshee365

Mobil 5W30 is great oil, it's what I use. That and 10W30. I alway's just use a Toyota filter from the Toyota dealer, they're priced about the same as aftermarket. I really believe in OEM parts. I've had knocking/ticking noises in several of my engines before by using aftermarket filters. Use what the dealer would and you're best off.

AzHotLS

iTrader: (1)

Hmm... the parts department at a dealer has shelves of parts in full view of customers waiting at the counter, what did I see? Lots of parts from NAPA.

Kyoei

I use ENEOS 5W30 with Toyota OEM filter that work great, I sometime use just Napa regular Oil 5W30, still work fine.

RA40

iTrader: (6)

I think you are mentioning the "European Car Formula".

I had to go looking:
http://www.bobistheoilguy.com/forums...1814195&page=1

At this level...oil is basically oil. If I were racing or with a modded motor, I might devote more time to investigating. I haven't done an analysis because it basically came back the same time and again with minimal changes. Whatever oil you like...use it and change what works for you.

cgreenberg

Yup, that's the thread. Hard to separate the hype from the bs from the facts. I've used M1 in the past (along with their filter) with good results. When I leased an Audi s4 a few years back that's what they spec'd. I will look for redline in the local autozone and see what that costs. One of the few US oils to meet their specs.

So, anybody running M1 0/40 i their LS400?

Bill Dowd

I am running m1 5W30 in my 1991 LS400 a guy in West lake CA ran a 1990 LS 400 658,000 miles and he used m1 5W30 and the engine was just like new I ran a cressida 529,000 miles with m1 and tore down the engine and the honing marks were still on the block which shows very little wear if any Type 4 toyota is also good but any syn will leave the dino oil in the dust for long wear and most new cars now using syn oil go about 10,000 -15,000 miles before changing it

PureDrifter

iTrader: (10)

Toyota Type-IV is TRANSMISSION FLUID

RA40

iTrader: (6)

I wish ours had gone that long...well kinda. If not for the worn Cressida, I wouldn't have the LS.

7schulz

What did you find out??

7schulz

Pics ??????

I would really like to use a 20-50 or 15-40 durring the summer the coldest it gets is 40-50 deg F (Indiana summers), and this chart says 20 should be good for that temp range? Can someone explain to me why anyone would use a 0W or 5W except for very cold winters?

RA40

iTrader: (6)

The "experts" have already given their suggestions...the manual. Unless your operating ambient temps aren't covered by the spec oil, then consider the change. Barring that, run the tests yourself by having oil analysis preformed.

Then ask yourself...how long is the intended service life of the car? Will it be driven past 200, 300, 400K miles? Each car is an individual due to many different maintenance factors and use. It is pretty reasonable to expect that with due care, the median LS400 will be good from 200-250K miles. It becomes an academic discussion in theory what will produce the longest lifespan.

7schulz

I'm still fuzzy on the reasoning behind the 0w and 5w. And I don't necessarily believe all things OEM's tell us. I worked with an couple very knowlegeable valvetrain engineers at CAT and they said 5w was thin and only recomended for fuel consumption(to meet CAFE standards) for not for wear protection.
If 250K is all these will go I will be disipointed I would like to see 300K-350K my Pontiac Grand Pre has 230K just changed the pulgs and it pulls like new.

Anytime Big Gov gets it's hands on stuff they mess it up.

http://www.nhtsa.dot.gov/portal/fueleconomy.jsp

Corporate Average Fuel Economy (CAFE)
First enacted by Congress in 1975, the purpose of CAFE is to reduce energy consumption by increasing the fuel economy of cars and light trucks. Regulating CAFE is the responsibility of NHTSA and the Environmental Protection Agency (EPA). NHTSA sets fuel economy standards for cars and light trucks sold in the U.S.; EPA calculates the average fuel economy for each manufacturer. This site contains an immense amount of information about the CAFE program, including a program overview, related rulemaking activities, research, fleet characteristics and summaries of manufacturers’ fuel economy performance since 1978.

cgreenberg

IMO , based on research, the thinner weight flows more quickly through the engine when cold. Most engine wear happens on start up, so this is an advantage. I can't see why you wouldn't use 0w30.

7schulz

True engine wear happens on start up but on a 50 deg F start up wouldn't they flow the same and then at the high end and high RPM wouldn't the 40 hold up better? Wouldn't a 40w leave a thincker film on valvetrain componenets? This is getting into the high mileage area where a thicker oil would be useful for seals and oil burn. Don't have leaks or burn yet.

cgreenberg

Sure, so go with 0w40. Flows better at start up than 5w40 and gives the weight you want when warmed up