Menu
Home
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Reply to thread
Click here to become an Official Member of BMW Club Malaysia
Download Form
Home
Forums
The BMW Range
3 Series
F30, F34
RON 97 or RON 95? What brand?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Message
<blockquote data-quote="silvy" data-source="post: 645428" data-attributes="member: 31483"><p>Thanks for all the replies. Actually, I am more concerned in how RON 95 affects the reliability of the car engine rather than how it affects its output performance. I know F30 can use RON95. But i have also heard that RON 95 in Msia is actually like RON 93? If that is true will the low octane level affect the engine in a long run?</p><p></p><p>Quote from wikipedia:-</p><p></p><p>The higher the octane number, the more compression the fuel can withstand before detonating</p><p>......</p><p>Self-ignition leads to inefficiencies (or even engine damage) if it occurs during compression prior to the desired position of the piston in the cylinder as appropriate for valve and ignition timing. The problem of premature ignition is referred to as pre-ignition and also as engine knock, which is a sound that is made when the fuel ignites too early in the compression stroke.</p><p></p><p>Severe knock causes severe engine damage, such as broken connecting rods, melted pistons, melted or broken valves and other components. The octane rating is a measure of how likely a gasoline or liquid petroleum fuel is to self ignite. The higher the number, the less likely an engine is to pre-ignite and suffer damage.</p><p></p><p>........</p><p></p><p>During the compression stroke of an internal combustion engine, as the air / fuels mix is compressed its temperature rises.</p><p></p><p>......</p><p></p><p>If during the compression stroke the air / fuel mix reaches a temperature greater than the auto-ignition temperature of the fuel, the fuel self or auto-ignites. When auto-ignition occurs (before the piston reaches the top of its travel) the up-rising piston is then attempting to squeeze the rapidly expanding (exploding) fuel charge. This will usually destroy an engine quickly if allowed to continue.</p><p></p><p>......</p><p></p><p> In a forced induction engine where at the start of the compression stroke the cylinder pressure is already raised (having a greater volume of air / fuel) Exp. 2 Bar (14.7Psi), the starting pressure or air / fuel volume would be 2 times that of the normally aspirated engine.</p></blockquote><p></p>
[QUOTE="silvy, post: 645428, member: 31483"] Thanks for all the replies. Actually, I am more concerned in how RON 95 affects the reliability of the car engine rather than how it affects its output performance. I know F30 can use RON95. But i have also heard that RON 95 in Msia is actually like RON 93? If that is true will the low octane level affect the engine in a long run? Quote from wikipedia:- The higher the octane number, the more compression the fuel can withstand before detonating ...... Self-ignition leads to inefficiencies (or even engine damage) if it occurs during compression prior to the desired position of the piston in the cylinder as appropriate for valve and ignition timing. The problem of premature ignition is referred to as pre-ignition and also as engine knock, which is a sound that is made when the fuel ignites too early in the compression stroke. Severe knock causes severe engine damage, such as broken connecting rods, melted pistons, melted or broken valves and other components. The octane rating is a measure of how likely a gasoline or liquid petroleum fuel is to self ignite. The higher the number, the less likely an engine is to pre-ignite and suffer damage. ........ During the compression stroke of an internal combustion engine, as the air / fuels mix is compressed its temperature rises. ...... If during the compression stroke the air / fuel mix reaches a temperature greater than the auto-ignition temperature of the fuel, the fuel self or auto-ignites. When auto-ignition occurs (before the piston reaches the top of its travel) the up-rising piston is then attempting to squeeze the rapidly expanding (exploding) fuel charge. This will usually destroy an engine quickly if allowed to continue. ...... In a forced induction engine where at the start of the compression stroke the cylinder pressure is already raised (having a greater volume of air / fuel) Exp. 2 Bar (14.7Psi), the starting pressure or air / fuel volume would be 2 times that of the normally aspirated engine. [/QUOTE]
Verification
Post reply
Home
Forums
The BMW Range
3 Series
F30, F34
RON 97 or RON 95? What brand?
Top
Bottom
