This is a subject we all need to keep up to date on and I'm not
caught up yet.
Currently most oil on the self has an "SM" certification which means it
contains 1/2 the ZDDP additives; you don't want this type of oil with flat
tappets. It is also my understanding that Diesel oil will have reduced
additives too.
It buyer beware out there. You have to keep up on this and you need
to know how to read the labels. You are looking for the "SL" rated oil.
Castrol Classic is suppose to be OK, Royal Purple has SL rated oil and I
believe Motorcycle oil has all the additives. You need to read the labels
carefully and you need to keep up to date on all of this.
An alternative is to put a roller cam in your engine which does not
need all the wear additives.
Ron Fraser
-----Original Message-----
From: tigers-bounces@autox.team.net [mailto:tigers-bounces@autox.team.net]
On Behalf Of DJoh797014@aol.com
Sent: Sunday, August 09, 2009 11:06 AM
To: huffb@southslope.net; tigers@autox.team.net
Subject: Re: [Tigers] Oil
Brad
Back on the list again.
This was discussed several times. The synopsis:
1. Modern off the shelf oil have reduced ZDDP because it destroys
the catalyst coverter This also causes excessive wear and
early failure of the camshafts and lifters. Starting a newly
rebuilt engine without the ZDDP will cause problems.
2. This may also apply to Mobol 1 and other synthetics
3. Shell Rotella oil used with diesels has the necessary ZDDP
but Shell is reducing the amount.
4. GM sells an additive that contains the ZDDP for their older
performance engines. I've seen it at Walmart.
My advice
1. Use Mobol 1 with the GM ZDDP additive
2. Use ShellRotella
In a message dated 8/9/2009 8:29:47 A.M. Eastern Daylight Time,
huffb@southslope.net writes:
What brand and type of oil are you guys with solid lifter cams using? I've
heard that there are issues with today's off the shelf brands.-Brad You
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