Oil Change Timing Question (distance vs. time)
#51
Member
Join Date: Mar 2008
Posts: 101
Likes: 0
Received 0 Likes
on
0 Posts
97 J30\71 220 gas 4-speed
Interesting tidbit about the teaspoon of "dirt" being fatal to an engine. If needed, GM used to actually have a part number for Dirt. I don't know what the constituents were, nor what use it was for, but you could buy it from them.
#53
MBWorld Fanatic!
[QUOTE=Defiant;2928192]I'd say Phoenix's heat is easier on an engine and most mechanical bits than Buffalo's winters. It seems harsh to us, but ambient is only half an engine's running temperature....QUOTE]
Since more wear occurs when an engine is cold I believe you are correct....although it's been a long time since I've done heat transfer problems. I know you can get thermostats calibrated for different temperatures and block heaters for cold climates you can't always plug in a car when parking it.
Since more wear occurs when an engine is cold I believe you are correct....although it's been a long time since I've done heat transfer problems. I know you can get thermostats calibrated for different temperatures and block heaters for cold climates you can't always plug in a car when parking it.
#54
Super Moderator
I'd say Phoenix's heat is easier on an engine and most mechanical bits than Buffalo's winters. It seems harsh to us, but ambient is only half an engine's running temperature.
Interesting tidbit about the teaspoon of "dirt" being fatal to an engine. If needed, GM used to actually have a part number for Dirt. I don't know what the constituents were, nor what use it was for, but you could buy it from them.
Interesting tidbit about the teaspoon of "dirt" being fatal to an engine. If needed, GM used to actually have a part number for Dirt. I don't know what the constituents were, nor what use it was for, but you could buy it from them.
Last edited by Glyn M Ruck; 07-09-2008 at 09:05 PM.
#55
Super Moderator
I'm not going to bore people with a long explanation but in today's world the big difference lies in the fact that petrol engine oils are formulated to combat low temperature sludge (Mayonnaise in the rocker box etc.) and diesel engine oils are formulated to combat high temperature sludge (dense black stuff). Dispersancy requirements for Diesel oils are also quite different as a result. Diesel engine oils also have a higher TBN (total base number) to neutralise the by products of higher sulphur levels in DGO than petrol. Excess base in a petrol engine oil can be detrimental. There is no difference in the level of refining between a diesel & petrol engine oil. The better they are, the more highly refined they are & then we move to ISO dewaxing - Group II, Group III, UCBO & Synthetics (or blends of these)
Last edited by Glyn M Ruck; 07-09-2008 at 07:04 PM.