shop-talk
[Top] [All Lists]

[Shop-talk] Oil analysis - Blackstone

Subject: [Shop-talk] Oil analysis - Blackstone
From: bspidell at comcast.net (Bob Spidell)
Date: Sun, 26 Jun 2011 15:46:46 -0700
References: <4E053F9D.4030002@xxiii.com> <4E0611D1.3050703@tx.rr.com> <E32E54EC-F383-4871-83EF-56F4C605EF77@gmail.com> <4E069550.2050902@tx.rr.com> <4E06B9C2.1070102@milleredp.com> <4E077958.7040306@frontier.com>
This topic has been beat to death on other lists (the Healey list for one).  
The consensus is Valvoline VR-1 racing 
still has adequate ZDDP.  Besides that, there are some specialty brands that 
still have ZDDP, or you can go with a 
synthetic like Redline, or use an additive.   Some swear by diesel oils like 
Shell(?) Rotella.  Castrol may still have 
some ZDDP in the 20W-50 oil, but the oil companies have been kinda coy about 
revealing what's really in their stuff.

Dunno about aircraft oils.  Light plane engines are usually hydraulic 
lifter/pushrod engines, so the oil would  need 
some extreme pressure additive  (and no cat to worry about).  OTOH, A/C oils 
are formulated to handle the lead still in 
avgas and all the blowby from the sloppy clearances in big air-cooled engines 
(Mobil 1 for A/C didn't fare well).  
Generally they aren't recommended for automotive use, but might be OK in an 
air-cooled bike.

Bob



On 6/26/2011 11:24 AM, David C. wrote:
> OK, I have a 1986 BMW R80RT (motorcycle) with pushrods and solid lifters.  
> Any recommendations for oil for a vintage 
> engine (I have been using GTX 20W50).  Aero oils?
>
>
>
> John Miller wrote:
>>
>> For older engines, especially flat-tappet pushrod engines but really any
>> engine with a lot of bits that slide on each other under high pressure,
>> it can be a very bad thing.
> _______________________________________________
>

-- 
*******************************************************************
Bob Spidell           San Jose, CA            bspidell at comcast.net

*******************************************************************

<Prev in Thread] Current Thread [Next in Thread>