Bristol Cars - Owners and Enthusiasts Forum  

Go Back   Bristol Cars - Owners and Enthusiasts Forum > Bristol Forums > 8 & 10 cyl Bristol cars

8 & 10 cyl Bristol cars Type 407 onwards - restoration, repair, maintenance etc

Engine Oil

Reply
 
Thread Tools Search this Thread Display Modes
  #1 (permalink)  
Old 25-12-16, 06:56 PM
Member
 
Join Date: Dec 2016
Posts: 2
Default Engine Oil

In the Bristol 407 handbook, it advises using, as engine oil, Mobiloil Special 10/30 or Esso 20/30 or Energol SAE 30.

This is odd as most V8s of this period are recommended to take a 20/50.

What is the best oil to use? A single grade sae 30 or a 20/30, as apparently recommended by Bristol, or the widely used 20/50.

In a similar engine Jensen recommend a 20/50, so why are Bristol, for a near identical engine, recommending only a 20/30? Does anyone know?
Reply With Quote
  #2 (permalink)  
Old 26-12-16, 06:01 PM
Member
 
Join Date: Mar 2009
Location: West Wales.
Posts: 421
Default

Years ago when I had my 408 which has the same 313 cu in engine as the 407 I ran it on 20/50 oil both pre and post engine rebuild, it was an oil burner before the rebuild and afterwards used hardly any between changes.
I also used 20/50 in my 410 which is of the same series and very similar to the earlier engine and by the time that came out Bristol were recommending 20/50 in the handbook.
I do use a straight sae 30 in a early 50's R Type and comma classic 20/50 in the other with no ill effects, my 603 has the same oil in it and personally I would prefer to use a 20/50 oil in an early v8 Bristol rather than a 30.
Not sure why the recommendations change it may simply because by the mid 60's the use of 20/50 oil was becoming more common and it was seen as an improvement over the earlier specifications and more suitable for sustained high speed on motorways.
Reply With Quote
  #3 (permalink)  
Old 26-12-16, 06:34 PM
Member
 
Join Date: Dec 2016
Posts: 2
Default

Thank you.
Reply With Quote
Reply

Tags
correct engine oil?

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 Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


All times are GMT. The time now is 03:14 AM.


This is the live site

Search Engine Friendly URLs by vBSEO 3.6.0 PL2