[Healeys] Oil grade for 100 Le Mans

[Bob Spidell]

Oh boy! Another oil thread!

Now that synthetic is no more expensive than mineral oil, in some cases 
cheaper:

https://www.costco.com/kirkland-signature-5w-30-full-synthetic-motor-oil-5-quart%2c-4-pack.product.100690432.html

... I use it in my more modern cars and newer lawn/farm appliances. The 
tractors and the '46 Chevy truck get mineral 10W-40, just because 
full-syn 10W-40 isn't common and, well, that's what my dad always put in 
them. However, until /proven/ otherwise I think flat-tappet engines need 
ZDDP (although some claim syns work as good or better to protect cam 
lobes--I'm not convinced). From what I've seen and read, ZDDP is 
verboten in lower-vis oils, because they're what's spec'd in newer cars 
with catalytic converters. Only 20W-50 is claimed to have 'sufficient 
ZDDP for flat-tappet engines;' Valvoline VR-1 even says it on the label. 
A few years ago. VR-1 suddenly disappeared from parts store shelves with 
no explanation given, then reappeared a couple years later. I'm no 
longer able to buy VR-1 online, but a local Autozone still has some on 
the shelf so I stocked up. I think, with 9 filters and enough oil for 9 
changes with top-ups I've got a near-lifetime supply. My guess is 
California will ban it outright at some point and, my rule-of-thumb is: 
"If California banned/is banning it it must be good" (see: 3M adhesive 
remover, Floway, mineral spirits, effective engine cleaners/degreasers, 
etc.).

Bob

On 3/21/2022 7:06 AM, warthodson at aol.com wrote:
> This seems to be a common opinion that unfortunately is not based on 
> science. I use synthetic oils of the correct viscosity & I do not 
> experience leaks. A well build engine & transmission/overdrive do not 
> have to leak. Sealants need to be applied to clean dry surfaces.
> Gary Hodson
>
>
> -----Original Message-----
> From: Douglas Barker via Healeys <healeys at autox.team.net>
> To: Jim Ryan <ryan at jimryan.com>; Bob Spidell <bspidell at comcast.net>
> Cc: healeys at autox.team.net <healeys at autox.team.net>
> Sent: Mon, Mar 21, 2022 8:37 am
> Subject: Re: [Healeys] Oil grade for 100 Le Mans
>
> In my humble expérience the synthetic always leasing more
>
>
>
>
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