Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×

Thread Tools Search this Thread Display Modes
Old 06-10-2021, 06:10 AM   #41
Rivet Master
92landyacht's Avatar
1992 36' Land Yacht
Grayson , Georgia
Join Date: Nov 2011
Posts: 1,381
Originally Posted by udidwht View Post
Not the first ad I've seen that labeled a lifter incorrectly.
You need to give in on this one. Flat tappet lifters are both hydraulic and sold and DO refer to the "flat" bottom of the lifter design. Actually they're not flat but slightly crowned. As opposed to roller lifters that have a round roller at the bottom. Don't call out a cam company for being incorrect as they're the ones that created the terms in the first place.

Just a few that would agree:
92landyacht is offline   Reply With Quote
Old 06-10-2021, 06:28 AM   #42
1973 Dodge Cayo Motovator
Outbackga's Avatar
Vintage Kin Owner
Dahlonega , Georgia
Join Date: Dec 2013
Posts: 63
Blog Entries: 1
92LandYacht, yes I agree.

So, I can show you a flattened cam lobe from my Dodge 360 with hydraulic flat tappets while using Valvoline 10w-40 synthetic oil. It was changed while on the road by a shop due to some non-related repairs, and was driven less than 2000 miles. I had to replace the cam and lifters.
It seems that Valvoline, like most modern oils have reduced ZDDP due to catalytic converters. Mine, being a 1973, has no catalytic converter. I run Mobil1 15W-50 for the high ZDDP content and 50 weight is listed in the manufacturers acceptable list.
This is my specific experience, but I do not want the expense and downtime of replacing the cam and lifters again. I have put over 50,000 miles on another vehicle using this oil, a 1987 V8 with 32 valves, no issues.
I do believe oil analysis is a great way to track your engine health.
Outbackga is offline   Reply With Quote
Old 06-10-2021, 01:51 PM   #43
Rivet Master
thewarden's Avatar

2016 27' International
Sherwood Park , Alberta
Join Date: Jul 2017
Posts: 672
Yes, motor oils with a high-zinc formula are a must to protect flat-tappet cams, lifters, rockers & other critical components in pre catalytic classic vehicles that run these types of valvetrains.

At least that is what 40 years of building classic hot rod engines has taught me.
thewarden is online now   Reply With Quote

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
To oil or not to Oil woodyarn General Repair Forum 14 08-03-2012 08:05 AM
Chevy 454 engine rebuild pacer General Repair Forum 3 03-22-2012 03:10 PM
RV 94 30' Airstream Land Yacht Chevy 454 Engine 78K mi eBay Watch Airstreams on eBay 0 07-16-2011 11:10 AM
RV 94 30' Airstream Land Yacht Chevy 454 Engine 78K mi eBay Watch Airstreams on eBay 0 07-05-2011 10:30 AM
Does the amount of engine oil increase with the addition of a larger oil cooler? Mr. D Mechanics Corner - Engines, Transmission & More... 5 03-07-2009 08:56 AM

Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.

All times are GMT -6. The time now is 10:19 AM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.