tinman

er.... what? My statement is correct. There is no difference between 5w-30 and 10w-30 at operating temperature. A XXw-30 weight oil is the same viscosity at 100C whether it's a 0w-30,5w-30 and 10w-30. See this link: http://www.bobistheoilguy.com/viscosity-charts/ You will note that no distinction is made between whatever winter rating an oil as and it's operating viscosity. If the knocking or pinging is heard when the engine is warmed up, an oil change from 5w-30 to 10w-30 will have no effect. My statement is correct.

tinman

What exactly about going to a 10w-30 from a 5w-30 would resolve an engine noise?

waiman3

M1 5W-20 Syn from costco.

Rock-a-Lex

iTrader: (4)

Royal Purple all the way baby!

I do like Amsoil too but never used their engine oil; I use it in my tranny. RP MaxGear in my diff.

VIP161

iTrader: (3)

5w-30 Eneos full synthetic.

Riksgs808

iTrader: (2)

I'm a royal purple guy.

ttaylor993

I use M1 5w - 20 full synthetic with Toyota filter. Car has 185k miles. I changed the valve cover gaskets a couple of months ago and was surprised (no shocked) at how clean the top of the engine was; absolutely no sludge and virtually no buildup.

Question - I see where a number of you say you have used the same oil since you've had your cars and that it works great. I am not doubting that it does work great for you. But, how do you know if you've only used one oil? Where is the basis for comparison? Just food for thought.

offbad

iTrader: (5)

walmart is cheaper

marshun

amsoil forever. all my cars use it. i will never use royal purple again. after cutting my oil filters open and checking them, theres no way i'll use royal purple again

Rock-a-Lex

iTrader: (4)

What did you find in your oil filter? I have been using RP for over 6 years on my modded GS4 that I drive in a very "spirited" manner. The car drives perfect with 132k miles now on the ODO.

Bippu147

iTrader: (9)

this thread should be renamed "what swill do you pour into your engine" considering you're all using junk oils.

1QWKGS4

iTrader: (3)

Been using Mobil 1 Syn for 16 years now.. No problems.. lol

mccrimmon

iTrader: (2)

and your recommendation is?

Aristo722

M1 High Mileage with OEM Toyota filter. M1 has done me wonders in all my cars. I recommenced amsoil if you have a un-naturally aspirated engine.

Rock-a-Lex

iTrader: (4)

Oh wise one, what should your car feel like with "real" oil versus the so to speak "crap" that we're using?

I have no problems with my car regarding sludge or burning oil and I have 132k miles on it. So, you can't say it reduces the life of your engine.

Let us know and be really convincing, maybe we'll switch.