no1sportz

Not snake oil either. Seriously, check it out. Large road trucks go over 100,000 miles between oil changes with synthetic lubricants. No joke. Why replace the oil if it doesn't need to be? Just because your father taught you to change at 3K? My father thought that too; he also used to think that synthetics were junk...lol. I just recently revealed to him that his beloved Mobil 1 he had been using for years wasn't a true synthetic that he thought it was...it was a blend. He discovered this when his old VW Jetta was leaking oil. I said "Hey Dad! Why not try a true synthetic? Your seals will swell and I bet your leak problem will be solved." Ofcourse he didn't believe his son...until he gave in and tried it. Sorry...off subject...lol.

Don't forget about the filter. It plays a huge role in how long your oil lasts/stays clean. I would never run extended drain intervals without replacing the filter at shorter intervals.

Also, I don't want to start a debate because this topic has been debated for years. I also am not backing synthetics to make revenue off Amsoil. I simply tried their products and have impressed with the quality. Give them a try. Bet you will be too!

Josh Combs

I would still do it at regular intervals because You have a lexus and engines are not cheap for these cars. Trust me I know, because we replace alot from neglegent people all the time who get one oil change in 30000 miles. Right now at work we have a lady who had her oil changed only @ 30k, 60k and 90k. Need less to say we are now replacing the engine under customer pay and that is not cheap.

-Josh

no1sportz

Ofcourse you are replacing her engine. She is an idiot and probably never changed her oil filter. Or air filter. Or did anything else for that matter.


With that being said I am one of the most **** people you will EVER meet when it comes to maintenance. Trust me, it gets done...lol. You are right about expenses, nothing is cheap. However I have great confidence in my 4.7, it's a Toyota design and is one of the lowest wearing V8s in the world...no kidding. It is extremely easy on oil. No Toyota engine has let me down yet and I have been practicing this with every car I have owned. I am at 21 cars now!! I recently sold a 2002 4Runner 3.4L with 150K on it. Changed that beast every 20-25K with filter changes at 5K-7.5K. Ran just like it did when new...wish I still had it for offroad duty!

GGGXXX

I trust the OEMs to do some serious engine testing before using a premium oil in their top-end cars: Porsche, AMG Mercedes etc all use Mobil 1 factory filled....besides Mobil 1 uses FULLY synthetic base oils, not the diluted mineral oils used by other companies and marketed under 'synthetic'..

I have also been using M1 in my BMW and works flawlessly for 50K plus....my Lexus dealership also promotes Mobil 1 for oil changes (but better to buy at Costco/ Walmart and bring oil in otherwise you pay a fortune)

TunedRX300

Hard fact comes from Used Oil Analysis, which is a spectro analysis of an oil sample from your engine that reveals amount of wear particles: copper, iron, aluminum, lead. It also tells you how viscosity holds up after X miles of usage and the amount of acid neutralization additives left in the oil.
Brand war is nothing new, what make one brand better for your engine and your driving style depends on your own UOA, if you care only about scientific data.

FWIW, here is one done on Chevy LS1 engine using M1 5w-30 and Amsoil 5w-30.
http://neptune.spacebears.com/cars/s.../oil-life.html
http://neptune.spacebears.com/cars/s...il1.html#topup
http://neptune.spacebears.com/cars/stories/amsoil.html

I have done on with M1 5w-20 on my RX300 with excellent result.
https://www.clublexus.com/forums/sho...=214826&page=3

Lexusfreak

I switched from M1 to Amsoil ASL 5W 30 personally. Was not impressed with M1 during the time I used it.

StarbuckGX

So is anyone running 5w-20 in the GX?? Thoughts on this?

TunedRX300

Here is one excellent M1 5w-20 UOA by a 2000 Toyota Thundra V8, same 2uz-fe engine. Look at the low wear after >13K oil miles.
http://theoildrop.server101.com/ubb/...c;f=3;t=003647

StarbuckGX

One more question... are you all running M1 Extended Performance or just standard M1??

CVsIS250

This is nothing more than an M1 gloat fest...any info on comparisons? What makes this better than Valvoline's product. I was a huge Valvoline Dino fan in the day. So unless there is some evidence other than recommendations, I won't change.

CV

Lexmex

Before we had the net, my father and I modded cars when I was younger and I remember the day that we talked with some other racers who recommended M1 to him...we were using Quaker State for his Nova, but tried the M1 and he noticed he weren't having to fill up at the gas station we usually filled up as often and he was clocking about .05 to .1 faster in the 1/4 mile.

It is not just M1, but Amsoil is also an extremely good oil superior to M1 (would use it if I could get it down here or import it without red tape).

In addition, it is key to use the right weight depending on how you drive your vehicle.

My uncle was a fan of Valvoline in his younger days, but Valvoline has decreased their presence in the Mexican market big time...used to use their PSF and synthetic brake products, but again no longer here.

So now I am using Ford Heavy Duty Brake Fluid and Mobil 1 ATF for PSF.

Best to try it and see if there is change.