b1gredek

finally made a change to synthetic,,,,,,, i must admit i do notice a change.... my car seems so much quieter now....... the engine revs a little faster,,,, not sure if i am gonna get better gas mileage or not,, well see........

np20412

I don't think i've ever NOT used synthetic?

damon

My 94 LS definitely got a little quieter after a change to synthetic. What that means , I can't tell you.

lexusk8

Tack up another one for the synthetic newcomers! Once you go synthetic, you'll never go back

Cloud9

iTrader: (2)

which synthetic did you use?

I recommend Mobil 1 Fully Synthetic

np20412

Mobil 1 is what i've been using for a LONG time. 5w30, as recommended by lexus. I've got a bottle of 5w40 as well, but haven't used it in the Lex. I hear its not good to use any viscosity other than recommended, any truth to that?

Fisher503

Mobil ! all the way

CompuMan

I agree with LexSC888. I use Mobile 1, 5w-30 in both my 1992 Lexus SC400 and my 2001 Acura CL . Both run very on this oil. I have used this oil in all of my cars for many years.

lexusk8

I also use Mobil-1 full synthetic, 10W-30 grade in my ES. Oil is strictly changed every 5K miles, and I buy 5 qts from Wal-mart for less than $20. Awesome deal

b1gredek

mobile one with a toyota filter is the road i took...... so far so good

PitBull

http://63.240.161.99/motoroil/ good info.

damon

Despite my best intentions, I let the temp gauge in my 94 LS spike to its capacity before I noticed it last Sunday.

I shut it down & got some water in the coolant resevoir & was able to continue with my short drive. Found & fixed the leak. It was a bad o-ring on a heater bypass line that runs from the bottom of the Thermostat housing under the manifold back to the heater control valve.

Note, my LS coolant system had pressure tested A-OK ( high in fact ) when the TB & coolant & hoses had been changed the month before.

Despite my bad resource management, there was no damage to my 1UZFE engine. The extra-protection of Synthetics/Mobil 1 to extreme heat may have saved my a**!!!
damon

PitBull

That is a great point, any vehicle that is no longer under warranty, I would think synthetic fluids would always give you additional protection that would cover your rear.

b1gredek

wow glad to hear your engine made it with no problems,,,,, still dont know why i was so hesistant to make the switch back then

koolaidman

ive never used syn. today for some reason i descided to pull my oil pan off. with and to my amaze. there was very min dammage to piston side walls. i do oil changes 3months or 3k miles. from what ive seen from going with syn. they form a substance like graphite. i dare for some1 to take this test.
use conventional(sp?) oil. put a magnet on the bottom of the pan at ur oil change pull off the pan and look at the residue tell me what u find

do the same with syn. u will see a difference