Volvo RWD 1800 Forum

INDEX FOR 1/2026(CURRENT) INDEX FOR 12/2013 1800 INDEX

[<<]  [>>]


 VIEW    REPLY TO THIS MESSAGE    PRINT   SAVE 

Lead Additive for gasoline B18B engine. 1800 1965

uid 4846's pic
posted by  JohnMc on  Wed Jul 2 04:45 CST 2003
Author: [PROFILE] [EVERY POST] [THREADS] [BEST POSTS] RSS Feed     [IGNORE ALL POSTS]
last visit: Thu Oct 23 07:42 CST 2014
[RELATED]

The general consensus seems to be that a head that was weaned off leaded fuel has a work-hardened face that will last very well indeed with no additives. Once that surface wears off (a normal valve job would do it immediately) it will wear down pretty rapidly. Also, high rpm use will also wear through that layer more quickly as well. The octane isn't (AFAIK) a factor in valve wear. Proper valve lash adjustment, however, is.

97 Octane might be overkill in a '65 1800S (10:1 CR). The manual may suggest that, but that was under a different measuring system (RON only). Today they use two different methods (RON + MON/2) which tends to drop the numbers slightly. A bit more accurate, but not quite on the same scale as RON only numbers. The 'old' 97 octane compares very well to modern 93 octane.






THREADED THREADED EXPANDED FLAT PRINT ALL
MESSAGES IN THIS THREAD

New Lead Additive for gasoline B18B engine. [1800][1965]
posted by  Havinfun  on Tue Jul 1 11:34 CST 2003 >


<< < > >>



©Jarrod Stenberg 1997-2022. All material except where indicated.


All participants agree to these terms.

Brickboard.com is not affiliated with nor sponsored by AB Volvo, Volvo Car Corporation, Volvo Cars of North America, Inc. or Ford Motor Company. Brickboard.com is a Volvo owner/enthusiast site, similar to a club, and does not intend to pose as an official Volvo site. The official Volvo site can be found here.