5w-20 motor oil : who's using it ? ...

[gid]

What brand ? Synthetic or conventional ( regular ) ? Increase in mileage ? More power ? More engine noise ( chain , valves ) than when using the 5w-30 ? THANKS

[YarisSedan]

I would use a synthetic oil with 5w-20. Usually synthetic protects just as much as the next highest step up of organic oil while giving you the benifits of a lower viscocity such as increased gas milage.

My brothers toyota had same amount of engine noise at idle as mine. And when he put in amsoil high performance oil. He said his car never has idled smoother. All the sound went away. And it feels like the car has more power on the freeway. It could all be in his head but i can say it does idle very smooth and its quite as a mouse on idle. I am very anxiouse to do the same to my car soon as the engine is broken in in a few more miles.

[IllusionX]

why 5w-20? 20 offers less heat resistance.

[gid]

Originally Posted by IllusionX

why 5w-20? 20 offers less heat resistance.

PENNZOIL Platinum 5w-20 full synthetic motor oil has has been getting very good Used Oil Analysises at http://www.bobistheoilguy.com/forums...Board=3&page=1 , viscosity numbers ( friction = heat ) have been quite good . Go to other pages for PLATINUM 5w-20 write ups .

[barryware]

5-30 here, full synthetic.

Works out because my wife's car takes 6 quarts for an oil change and the yaris takes 4. The extra quart I end up with (when buying 5 quart jugs) goes in her car.

[PaidTimeOff]

Just did my first oil change with some cheap 5w20 dino oil. Seems to run the same to me, but the car's still basically brand new so I don't think it can run much smoother than it already is. I decided to wait until at least my next oil change to go full synthetic. I'll be going Royal Purple. Still haven't decided on 5w20 or 5w30 for that...

[gid]

Originally Posted by PaidTimeOff

Just did my first oil change with some cheap 5w20 dino oil. Seems to run the same to me, but the car's still basically brand new so I don't think it can run much smoother than it already is. I decided to wait until at least my next oil change to go full synthetic. I'll be going Royal Purple. Still haven't decided on 5w20 or 5w30 for that...

which cheap dino for 5w-20 ?

[marcus]

in canada they dont suggest 5w-20 then again dealer is a dealer they will tell you to use whats written on the oil cap..

[floydisrock]

deleted

[PaidTimeOff]

Originally Posted by floydisrock

I don't know why anyone would use 20 weight.

Marginally better mpg and some of us in more temperate climates (Hawaii, for example) don't need the higher weight oil.

[PaidTimeOff]

Originally Posted by gid

which cheap dino for 5w-20 ?

Rather not say, because we don't need to turn this thread into a "this oil is better than that oil" thread

[gid]

I'd rather see everyone stick to topic , not to include 5w-30 , or question it's use . THANKS

[floydisrock]

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[candy_jai]

I changed to 5w20 castrol syntec at 20,000km and from my observation, it was rough for the first 1000km, and my milage went down. Now with about 2500km later, it still idle roughly as i can hear the ticking when stopped while in D. Overall the engine seems to be noisier and sounds more rougher. I can hear the plastics in the rear hatch vibrating abit when accelerating gently (2000rpm). On the next oil change, ill try 5w30 castrol syntec bought on sale from canadian tire.

[Ace]

Originally Posted by gid

What brand ? Synthetic or conventional ( regular ) ? Increase in mileage ? More power ? More engine noise ( chain , valves ) than when using the 5w-30 ? THANKS

Started using 5w-20 synthetic on first oil changed… bought new 08 yaris may 2008… will continue using 5w-20 until next summer… then I switch to 5w-30 synthetic.

Never kept up with mileage, power or noise.

[SilverGlow]

Originally Posted by IllusionX

why 5w-20? 20 offers less heat resistance.

A lot of people that don't understand how oil works think this.

Thinner oil means faster circulation at start up. Faster circulation to the farthest reaches of an engine means less wear. And it is at start up that 90% of engine wear happens. At full operational speeds, the protection that w20 provides is nearly identical to most 30 weights.

[gid]

Originally Posted by SilverGlow

A lot of people that don't understand how oil works think this.

Thinner oil means faster circulation at start up. Faster circulation to the farthest reaches of an engine means less wear. And it is at start up that 90% of engine wear happens. At full operational speeds, the protection that w20 provides is nearly identical to most 30 weights.

.

[TheSilkySmooth]

Originally Posted by SilverGlow

A lot of people that don't understand how oil works think this.

Thinner oil means faster circulation at start up. Faster circulation to the farthest reaches of an engine means less wear. And it is at start up that 90% of engine wear happens. At full operational speeds, the protection that w20 provides is nearly identical to most 30 weights.

This is an oversimplification on your part. The oil must provide adequate viscosity for the running clearance of the engine design - most critical are the journal clearance and piston to wall clearance. If you run an inadequate viscosity you will easily have catastrophic engine failure. As for margin lube contact wear in cam lobe-to-tappet face, piston top-to- bore, crank flange to journal thrust cap, and unfortunately add for our engines; timing chain sprocket to guide and chain to sprocket. Proper lubrication here relies all on the polar nature of the base oil (most popular syn are NOT polar) and the metal salt extreme pressure additives in the oil. Without them you WILL have premature wear no matter how good your base oil is (Good as in Motul, Redline, Fuchs, ELF NOT Mobil, Pennzoil, BP!) If toyota specs 30w and 20W they are really flirting with disaster. The motor MUST be clearanced for one or the other. Guaranteed we will see a high percentage of spun bearings and collapsed piston skirts with this misguided TSB policy on our 1nzfe engine.

Sonja's Dad