WalkingDrunken

I also use 10W-30 mobil one. thanks for your help guys.






Summary: 10W-30 and 5W-40 are both recommended from Honda. 10W30 is used in warmer climates . If you have any questions just stick with the 10W-30

xviper

This statement and this reasoning is not quite correct. "5W40" can be used at ANY temp. It's "10W30" that's to be used when temps do not drop below -20*C. The "more" correct statement would be, "10W30" is used in warmer climates and is more often used.
5W40 is "hardly" used because it is not universally or easily available in all locales or market regions. If I could easily get this oil, this would be all I'd use all year round. It makes for a slightly easier cold start (not just in cold climates) and will give just that extra modicum of higher viscosity during hard running.

DrCloud

Verrrrrry interesting. This is the first time I've seen this stated so unambiguously, and I'll go with it myself.

There have been other discussons about 5W-40 (and 10W-40) being too thick to work well at the upper end of our rev-range. But because Honda classifies normal driving here in Florida as "extreme conditions" (at least one dealership does), that would seem to warrant this better-performing oil. HPH

WalkingDrunken

A little more correct?

Summary: 10W-30 and 5W-40 are both recommended from Honda. 10W-30 is used in warmer climates and is more often used. If you have any questions just stick with the 10W-30

xviper

Just to make sure noone is misled, I have been misquoted in the above quote. It states that I quoted "0W40". This is NOT so. I quoted "5W40".

Although the differences may be subtle, we must distinguish between "5W40" and "10W40" motor oil and in particular, whether or not we are talking about full synthetic or non-synthetic (*see below). It's been said on this forum by "oil people" that a 5W40 is just a tad bit thinner at operating temps than a 10W40, as if to say that a winter rating of 5 will "bring down" the upper viscosity a bit more than a winter rating of 10. While I would not hesitate to use a 5W40 during the hot summer months, I don't feel the need to use a 10W40. On a cooler summer morning, a 10W40 might just be thick enough that oil pressure can be elevated to a level just beyond my comfort zone.

*I tested the pour characteristics of two 10W30 motor oils, one being a Castrol GTX and the other being a Mobil 1. After sitting in a -18*C freezer for several hours, the Mobil 1 poured like it did at room temp while the Castrol poured like molassus.

Boston Duce

First, props to xviper as the calming voice of reason.

Mobil SUV is the consumer repackage of Delvac-1, Mobil's heavy duty diesel/gas 5W-40 oil. (I've only seen Delvac-1 in gallons, and sold by fleet suppliers)

It is one of the few 5W-40's that are "almost readily available" in the US, and it is a 'full synthetic', even though the definition of 'synthetic' has become blurred in recent times.(thanks Castrol USA)

RoadRage has reviewed this in his "Oil Journals" and given it his tribilogical blessing.

Delvac-1/ SUV has all the stuff to do 100,000 miles OCI's in over the road trucks.

We use it in our delivery diesel, and typically go 2 years, 20kmi OCI in tough city work, and it still comes out ok. I can tell you, yes, it is a help in low-temp starting, and yes, it helps reduce oil consumption, from my experience.

Everything else it may do good, will take years and a engine tear-down to determine.

It is expensive, approaching $7.00 / qt.

It only makes sense to use it in cars if you are going to extend your OCI +3-4 times, or, you get it 'free' like me

With the almost unlimited supply of good motor oils that can be purchased at a fraction of it's cost, do you need an oil like this-no, the question is, do you want an oil like this?

Only you and those itchy dead presidents burning a hole in your pocket can answer that.

Most people will want to change it out far in advance of it's useful life. If you do that, it's ok, it's your $$.

Regards,
BD

DrCloud

Oh, crap. Sorry, xviper. That was a typo.

I've used M1 0W-40 (in an Audi bi-turbo) and it's fine stuff; but I didn't mean to endorse it for the S or misquote you. HPH

raymo19

You, sir, REALLY crack me up sometimes.

xviper

No problemo.

LUVNMBRS

I saw in a previous post (can't seem to find it now) with a link to the Honda Japan website which stated 5W40 was preferable to 10W30, although both were considered acceptable.

You must remember that here in N. America, auto mfrs. must comply with CAFE (Corp. Avg. Fuel Economy) numbers in order to sell cars here, thus the push for more fuel efficient 10W30 (compared with 5W40), at the detriment of engine protection.