SL/R107: Mobil one oil
Thread Starter
Newbie
Joined: Aug 2011
Posts: 11
Likes: 0
From: Kittery, Maine
1978 450sl
Mobil one oil
My new 78 450sl has 135000 miles, the previous owner has used Mobil one oil for the last ten years. pulling the dipstick reveals very clean oil. Not due for a change for 1000 miles. Now the problem, Is this oil ok to continue with, or is it better to go with my favorite, Castrol.
Super Member
Joined: Aug 2007
Posts: 876
Likes: 81
From: Phoenix AZ & Cayucos CA
’27 AMG SL55(ordered), ‘23 EQS 580 SUV, ‘19 AMG E53 Cpe, ‘48 Willys Jeepster
+1 for Mobil 1. Used throughout the life of our old BMW e28 M5. Inside the engine was nearly new at 175k miles even with 10k change intervals. I switched after seeing too many engines totally sludged up that used Castrol GTX changed every 3k miles.
Last edited by lkfoster; Sep 8, 2011 at 08:28 AM. Reason: added change interval
Senior Member
Joined: Sep 2007
Posts: 270
Likes: 3
From: Overland Park, Kansas
SOLD both: 1987 560SL 2003 ML320
I'm impressed that the PO used Mobil 1 for ten years and the motor did not start leaking. Normally these old SL motors that have run 100K+ miles on conventional oil start leaking when switched over to the thinner M1.
Both the local dealer and my independent shop recommend sticking with conventional oil for my 87 560SL. (104K miles)
Both the local dealer and my independent shop recommend sticking with conventional oil for my 87 560SL. (104K miles)
Member
Joined: Jul 2010
Posts: 137
Likes: 0
From: Southern Illinois
82 380SL 96 SL500
I'm impressed that the PO used Mobil 1 for ten years and the motor did not start leaking. Normally these old SL motors that have run 100K+ miles on conventional oil start leaking when switched over to the thinner M1.
Both the local dealer and my independent shop recommend sticking with conventional oil for my 87 560SL. (104K miles)
Both the local dealer and my independent shop recommend sticking with conventional oil for my 87 560SL. (104K miles)
My '82 had M1 in it when I purchased it so I've continued with no issues.
