20w40 hard to find

everyone sells 10w40 20w50 and even 15w40 sooooooooo?

 

So I'm running 15w40 instead of 20w40 in my Yamaha.

 

So, it don't REALLY make that much difference.

If you actually LOOK at the little chart included in most owner's manuals,
it often includes other viscosities too.

If you live in a generally cold climate, use 10W40 or 15W40.
If you live in an ungodly HOT climate, like the desert southwest US, then
use 20W50............and don't fricking worry about it.

 

What he said.

 

thankz

 

Have you checked out the high-shear, low viscosity multigrades sold for
diesels?

 

<Interested>

OK, go on....

 

At a guess, Shell Rotella. Seems to come out -extremely- well in used oil
analysis tests when used in bike engines.

Certainly better than fucking run flat tyres


^^^^^^^^^^^
stinky bait.

 

I'd been using Halfords own brand 15/40 diesel multigrade since I bought the
s/hand 76 CB200 (a couple of years) with no problems, until I went in to
Halfords for more oil and the sales weasel pointed out Castrol was on
special offer so I bought that instead - within 600 miles the main bearing
was giving me double vision at 5000rpm. When I stripped the engine, the ring
gap was a good 1/8" and the play in the RH big end was feelable by hand.

It didn't even rattle before I switched from Halfords own brand to Castrol.

 

And your point IS....????

There is more than an even chance that it was effectively worn out BEFORE
the brand switch and would have shown up about the same time regardless of
what you did.

 

I'm using Shell RotellaT 15w40 in my FZR1000. The annual temperature
range around here is ~30 degrees F to 110 degrees F, and if it's over
100 degrees out, I'm not going to be riding in that oven, I'll be in
air-conditioned comfort in my SUV.

I seem to recall, from reading earlier discussions on the web, that
the older version of Rotella formulated for diesels had more sulfur
content than oil formulated for gasoline engines and was, therefore,
kinder to camshafts and followers.

But my main reason for switching to Rotella was to try to make the
clutch release a little better so the 1st gear to 2nd gear shift
wouldn't be so clunky.

However, it seems that the transmission simply cannot be rushed, I
have to de-clutch, roll completely off the throttle, and very
carefully shift through neutral into 2nd gear to avoid a loud *clunk!
*...

 

Castrol might work OK in a new engine but it certainly doesn't provide
enough protection for a worn engine, whereas Halfords cheap own brand
(probably recycled) worked just fine in a 30 year old engine (although the
seller did claim it had been rebuilt - I'm inclined to believe, as the
camshaft bearings had bushes inserted although the damaged camshaft was put
back in).

My point is that anyone doubting that 15/40 can be used instead of 20/40
might benefit from using the high-shear 15/40 that's sold for the harsher
wear in a compression ignition engine - but steer clear of Castrol, it most
certainly does *NOT* do what it says on the tin!

 

Oh Jesus!

Aside from you own highly biased, anecdotal experience, what other evidence
do you have that Castrol is in any way REALLY deficient when compared to
other major brands ????

I'll bet that the people who buy (probably) millions of quarts of the stuff
each year would REALLY be interested to know they are being scammed.

 

Which Castrol are you talking about? Their bargain basement economy
stuff, or their top grade synthetic or what? Given the choice between
your ranting and the reputation of a major lubricants manufacturer
with a long and respected history, my money wouldn't be on you, I'm
afraid.

 

They're probably running newer engines that get away with Castrol's
deficiency. It doesn't provide adequate protection for older engines -
surprising then that Halfords cheap own brand (probably recycled) worked
fine for a couple of years and then the engine failed after only 600 miles
after switching to castrol.

 

I went into Halfords and asked for their own brand diesel 15/40, the sales
weasel pointed out that the castrol product was on offer and cheaper than
their own brand, AFAICR it was the Castrol version of diesel 15/40.

All I know for sure was that 'saving' cost me an engine that had worked
perfectly fine (not even any rattles) for a couple of years on Halfords
cheap own brand diesel 15/40.

I've gone through a lot less engines since I made that connection.

 

I used to pay the premium for Castrol oil and I used to get through a lot of
engines, now I don't and don't - kinda hard to ignore!

 

And you think the oil was to blame for it deciding to lie down and die?
Did you check the oil spec against the Halfords stuff? Or against the
engine manufacturer's recommendations?

 

Oh just give it up.
You need to learn the difference between fact and conjecture.....or between
substantiated evidence and a wild guess.
It's pretty hard to ignore those acorns falling on your head
too.........the SKY is falling........
This discussion would be comical......if it wasn't so pathetic.

 

Mostly a long list of CB200s, 175s and CB250G5s, the CB400Fs fared better
and a GS550 was traded on because it needed expensive work on brakes and
suspension - it survived the castrol because it wasn't very old.