[Roadsters] Oil for a U20

[Gary Boone]

Since the U20 and R16 engines are flat tappet engines, read this:
http://www.tomorrowstechnician.com/Article/16249/lubricants_performance_oils_
and_additives_got_zinc.aspx




________________________________
From:
barterdude <barterdude at comcast.net>
To: nmleeds at mindspring.com;
datsun-roadsters at autox.team.net
Sent: Monday, December 15, 2008 9:31:20 AM
Subject: Re: [Roadsters] Oil for a U20

We rebuilt the motor when we restored
the car after pulling out of a
backyard sitting for 7 years.  After use
Valvoline 10 - 40 during break-in,
I switched to Royal Purple 20W - 50.  Being
in the cold of Colorado, I
normally don't drive it during the winter, but I
will start it up once a
month and let it run to hot for 20 minutes.  No leaks,
no usage, no death
rattle (highly suggest race blocking your chain tensioners
(use washers in
side) to keep the chain tighter.  Have done this on several
U20's without a
problem. 



Gary Lasater

founding member www.wycroc.org

'63
SPL310-300161C

'63 SPL310-300289B

'64 SPL310-001289

'69 SRL311-12536

'70
SPL311-28169



-----Original Message-----
From:
datsun-roadsters-bounces at autox.team.net
[mailto:datsun-roadsters-bounces at autox.team.net] On Behalf Of
nmleeds at mindspring.com
Sent: Friday, December 12, 2008 4:57 PM
To:
datsun-roadsters at autox.team.net
Subject: [Roadsters] Oil for a U20



What oil
to people use? I have been using 10-40 at sea level, but, it seems
like its
slow to get flowing (strangely high pressure during the first 5
minutes of
driving) and burns straight through the engine when I run it hard
(1 qt. every
250 miles). After I've been running it hard for an hour the oil
pressure at
idle drops to nothing -- these readings all from my
super-reliable original in
dash four-cluster (so take with a huge grain of
salt)



I'm tempted to try
5w-50 but thought I'd pick the big brains before I did
anything that drastic.
Nathaniel

u20-69 SU's (having too much fun)
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