5w30 vs 5w40

[Swiftee]

That means is not recommended or wasteful to use Mobil 1 Fully Synthetic Oil SAE 5W-50 for normal car with mileage below 80-100K?

[Trex101]

That means is not recommended or wasteful to use Mobil 1 Fully Synthetic Oil SAE 5W-50 for normal car with mileage below 80-100K?

 

Mobil 1 is fine but 5w50 would be too thick for a normal NA car, a highly boost turbo like a STi would be fine though but ideal oil grade would still be a 10w40 instead of 5w50.

[Swiftee]

Mobil 1 is fine but 5w50 would be too thick for a normal NA car, a highly boost turbo like a STi would be fine though but ideal oil grade would still be a 10w40 instead of 5w50.

 

Oh...i was offered this 3 options by the ws for my korean car for the next servicing

 

Premier Multi-Grade Oil (SAE 15W-40) $58

Power Fully Synthetic Oil (SAE 5W-40) $98

Mobil 1 Fully Synthetic Oil (SAE 5W-50) $128

 

So i think a wise choice would be the middle one?

[Robo]

Oh...i was offered this 3 options by the ws for my korean car for the next servicing

 

Premier Multi-Grade Oil (SAE 15W-40) $58

Power Fully Synthetic Oil (SAE 5W-40) $98

Mobil 1 Fully Synthetic Oil (SAE 5W-50) $128

 

So i think a wise choice would be the middle one?

 

neither of the 3 please....

[Trex101]

Oh...i was offered this 3 options by the ws for my korean car for the next servicing

 

Premier Multi-Grade Oil (SAE 15W-40) $58

Power Fully Synthetic Oil (SAE 5W-40) $98

Mobil 1 Fully Synthetic Oil (SAE 5W-50) $128

 

So i think a wise choice would be the middle one?

 

A wise choice would be to bring your own Fully Syn 5w30 engine oil, it's not about the money save on the oil but the long terms fuel saving by using a more fuel efficient engine oil weight.

 

I have never heard about Power fully syn, maybe you may want to do some research first before using it.

 

Simple FC saving calculation for 10k km driven.

12km/l improve to 12.5km/l

 

12km/l used 833L of petrol at $1.747(92Ron) = $1456 petrol cost

12.5km/l used 800 of petrol at $1.747(92Ron) = $1398 petrol cost

 

Saving of $58 in 10k km.

 

The fuel saving itself will pay for the engine oil, why not?

 

[Priest7]

For normal auto 1.6l car, it's advisable to use 5w30 over 5w40?

 

Will the fuel efficiency drop alot if i use 5w40?

 

And how come some pple use 10w30 or 10w40?

 

Thanks

Cheers!

:)

[Trex101]

For normal auto 1.6l car, it's advisable to use 5w30 over 5w40?

 

Will the fuel efficiency drop alot if i use 5w40?

 

And how come some pple use 10w30 or 10w40?

 

Thanks

Cheers!

:)

 

Yes, as it's startup protection & FC gain is better for a 5w30 compare to 5w40.

 

There is a differences during lab bench test but how much differences in real life, you got to try it out yourself. No one can give you a definably answer. Expected gains are around 3-5% range compiled from customers feedback, some figure for you to work with.

 

There's no differences between 5w30 or 10w30 at 100'c, it's still a w30 oil. 5w only mean it can flow under -30'c condition while a 10w under -25'c, the first number are SAE "Winter" rating.

 

[Agentwilson]

Oh...i was offered this 3 options by the ws for my korean car for the next servicing

 

Premier Multi-Grade Oil (SAE 15W-40) $58

Power Fully Synthetic Oil (SAE 5W-40) $98

Mobil 1 Fully Synthetic Oil (SAE 5W-50) $128

 

So i think a wise choice would be the middle one?

 

 

comfort delgro ws must be

[Octopus]

comfort delgro ws must be

 

Hee..hee.. you speak like Master Yoda...

[Agentwilson]

huh...who's tat?

[Swiftee]

A wise choice would be to bring your own Fully Syn 5w30 engine oil, it's not about the money save on the oil but the long terms fuel saving by using a more fuel efficient engine oil weight.

 

I have never heard about Power fully syn, maybe you may want to do some research first before using it.

 

Simple FC saving calculation for 10k km driven.

12km/l improve to 12.5km/l

 

12km/l used 833L of petrol at $1.747(92Ron) = $1456 petrol cost

12.5km/l used 800 of petrol at $1.747(92Ron) = $1398 petrol cost

 

Saving of $58 in 10k km.

 

The fuel saving itself will pay for the engine oil, why not?

 

Sounds very reasonable. :)

In this case what is a good brand to go for and how many bottles do i need for 1 engine oil change?

Cos normally i just leave it to ws to do.

[Yuan]

It depends more on how you take care of the engine, if using good quality synthetic then 150-200k can be considered high mileage. but if using low quality oil then upon 70-80k the engine would look like a 150-200k engine.

 

Differences between using good quality synthetic and crap synthetic

 

How do we differentiate good quality synthetic and crap synthetic?

[Octopus]

huh...who's tat?

 

Master Jedi from Star Wars movie...

 

Master Yoda: comfort delgro ws must be

 

vs

 

Earthlings: It must be comfort delgro ws

 

[Priest7]

Yes, as it's startup protection & FC gain is better for a 5w30 compare to 5w40.

 

There is a differences during lab bench test but how much differences in real life, you got to try it out yourself. No one can give you a definably answer. Expected gains are around 3-5% range compiled from customers feedback, some figure for you to work with.

 

There's no differences between 5w30 or 10w30 at 100'c, it's still a w30 oil. 5w only mean it can flow under -30'c condition while a 10w under -25'c, the first number are SAE "Winter" rating.

 

Very good insight, guess my next oil change i will change to w30 instead of w40. i'll notice my FC drop quite abit after changing to w40.

 

Thanks

Cheers!

:)

 

[Kyojin]

how certain are you that the "many" siroccos that you've seen "being towed back on NSHW" are all caused by using 30wt oil?

 

unless you have scientific proof, research or documentary done, i don't see why people should subscribe to hearsay and not follow manufacturer's specs if the car is entirely stock. 30wt oil is more than sufficient these days even for turbo cars. the 40 wt theory is old school. it's the most "recommended" oil in Singapore because they are the most commonly supplied to workshops and probably with higher commission margins too.

 

even in different climates, only the winter rating makes the difference. they may need 0W30 or 5W30, but in warmer climates you can use 10W30. think the TS should go with what's in the owner's manual and follow manufacturer's recommendations.

 

if you are going for a track day, you should get a little more protection by changing your oil to a 40 or even 50 wt oil before the track day and then flush immediately after. it's all about how you maintain the car.

[RedBeanMilk]

I respectfully disagree.

 

In my opinion, 30k mileage use 40 engine oil is way too early. High mileage might be in the region of 75k or 80k mileage onwards.

 

 

hahaha.. tats y reading the manual is the best..

 

a lot of hear say hear say...

 

it also boils down to how long and how much the owner willing to spend..

 

 

[Trex101]

Sounds very reasonable. :)

In this case what is a good brand to go for and how many bottles do i need for 1 engine oil change?

Cos normally i just leave it to ws to do.

 

How much qty you need depends on your car model but generally a Korean 1.6cc car will take 4qt of engine oil. As for the good synthetic brand, just do some research, google for it, sure can find something you like one.

[Trex101]

How do we differentiate good quality synthetic and crap synthetic?

 

Like what i tell Swiftee, not nice of me to quote a brand be it good or crap but do some research, you sure will find the answer you seek.