T2 Bay Sluggish after oil change

The only place I use SAE30 is in the air compressor, for an engine it’s just wrong, too thick when it’s cold and too thin when it hot. A type 4 will thank you for using a 15w/40 multigrade and in case you missed it above there is no need to touch the strainer – bad things can happen if you do.

 

Was it very cold when you did the oil change and went for a drive?

 

Stick 15W40 in it, and post a pic of the treacly oil.

 

15W40 all day

https://www.ebay.co.uk/itm/174032473351

 

+1 for 15/40

I did try some of the Halfords Classic 20/50 once and I swear it didn't run as well.

 

Bizarre isn't it, I've used 15/40 and didn't like it.
So 20/50, and has been for the last 14 years!
Then again I prefer air from my own compressor in the tyres rather than that petrol station muck
GE 2.0 type 4 for clarity..

 

What didn’t you like about it?

I use MOTUL classic 2100 15W50 here in France, 15W40 is fine in the winter but I found the pressure dropped at idle in the summer. (2,316cc Type 4)

 

The "thinner" the better to a point... though it's not really "thin".
Mine doesn't build pressure quickly with 10w-xx but 15w-40 it likes.

 

I found that in hot climes the iffy tappet we've got would leak down quicker. It may have been coincidental but I've just stuck with that weight. Most of our distance stuff always involved heading to the med, so I suppose that would have been a factor.
Plus I use it in the diesel boat engine, and the other vehicles so it means less thinking for my teeny brain
They all get oil changes at about 3k anyway so it's always clean and not overly stressed.
Edit, I don't have a pressure gauge, only a cht, so in this case ignorance has been bliss..

 

Is this turning into another what oil thread

 

No, this is not going to be the oil. What got knocked off when the oil was changed is the issue.

One loose ignition lead will result in a sluggish and rough engine ..

 

..do you know by any chance how much of zddp does it contain?..I’m about to change an oil on my bus and tbh my engines always seemed to be happier running on 15w40 comparing to 20w50 but couldn’t find any15w40 with enough of zddp?


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Millers Pistoneeze 15w40

 

Not sure on zddp figures but I believe it’s quite high. If you can pick up on some previous ‘what oil threads’ there are quite a few, Miller’s does come recommend with a good percentage of zddp added.

 

I think the importance of the ZDDP falls off with time. On a fresh engine during break-in as the cam and the tappets are rapidly polishing each other its important. Once it has smoothed down the surfaces, the amount required lessens.

 

I was thinking about this too the other day and found an interesting site which compared (amongst other things) the ZDDP content of various 'classic' oils. I bookmarked the site on my laptop but I'm on my phone right now. I'll post it up tonight if you're interested.

If I remember correctly, Pisoneeze has a generous ZDDP of 1100ppm, the info can be found on their website. I was surprised to read that some of the favourites like Castrol Classic are as low as 600ppm (don't quote me on these figures, I'm trying to remember from what I read a few days ago). It was a bit harder to find information on Morris Goldenfilm 30 (for VW engines) but that was even lower!

I'll say no more as don't want it to become one of those threads but leave that link out later if anyone wants a read.

 

..thanks guys..I will go for that millers pistoneeze then

PS. sorry for the thread hijacking...
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It’s good stuff. Opie oils will sell you some.

 

Valvoline is another oil with high zinc content:

Valvoline VR1 Racing Oil contains .13 percent zinc and .12 percent phosphorus.

https://www.valvoline.com/about-us/... VR1 Racing Oil contains,13 percent zinc and .

£30 for 5L delivered from Pipercross

https://www.pipercrossperformanceoils.com/product-page/valvoline-vr1-racing-20w-50

 

This is what I used to use. Great I thought.