YviE

iTrader: (3)

I will probably use full synthetic as long as my car doesn't burn any oil. Maybe then I'd switch to high mileage.

So go with full synth!

bigwasum

iTrader: (2)

Full Synthetic

User 122922

I’m in the same boat thinking on switching back to regular after used HM for almost 1 year now, is it a problem to switch back to regular ? Any advice ?

LexusK

iTrader: (14)

Bumping up an old thread.

I have a 1998 GS400 with 179k miles that has always used conventional oil from the Toyota Dealership. I recently took it to my independent mechanic for some work and he threw in an oil change. When I got the invoice back I noticed that it said "Synthetic Blend." What is a "Synthetic Blend" and how should I be handling my oil changes from here on out? Am I able to go back to conventional? Should I move to Synthetic? Is it recommended to switch to synthetic if I'm at higher mileage? Thanks.

lastguy

I started to use synthsized oil since 45K now 145 it does have leak here and there not easy to identify, include cover gasket - replaced and oil pan I think.
For old car pls use high mileage oil which soften seals to help reduce leak. if you change oil on time, syn oil won't increase engine life I think. Till now I change oil 8-9K now I want to change it 6month no matter how. I don't drive more than 15K a year.

BayAreaLex

5W-30 conventional oil changed every 5k miles.

165k mikes, runs like new.

natman

I use Mobil1 5w30 full synthetic in my 2002 GS300, changed every 7,500 miles. Doesn't burn or leak a drop, so I see no reason to use something different.

byung0311

I do same on my motorcycle but not on my 231k gs300. at firestone they choose the oil for me and its usually high milage. i use regular oil on my goldwing with 142k but no issues on it.

BayAreaLex

Regular cheap conventional oil

Change every 5k miles, that’s all you need.

We’ve had several cars in our family with over 200k miles that followed the philosophy above - never a problem

SaiyanGS3

iTrader: (8)

the issue is there is no such thing as Dino or conventional oil past the SM spec, so all oils off the counter are some type of synthetic blend to make the spec.