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Registered:
May 2005
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changing from LRP to PULP...
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Tue, 31 May 2005 14:03
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So after drinking leaded and lead replacement petrol for all of it's 22 year life, I'm gonna start feeding my KE-70 Corolla (4K-C engine) premium unleaded. I've read that it'll clean the fuel system right out and that the fuel filter will need changing a few times in the near future. Also, I've read that goo will probably end up in the sump so I'll probably need to change the oil and oil filter a few times too.
Has anyone experienced this? Does it actually happen? How often should I change my fuel filter and oil/oil filter? Is there anything else that will need extra maintainence during this transition? Spark plugs maybe?
thanks
matt
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Location:
Hawthorn, Vic
Registered:
March 2005
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Re: changing from LRP to PULP...
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Tue, 31 May 2005 14:18
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um, from what ive read, bisically;
-filter will need to be changed.
-'should' change the valve seals from the older type to the newer type which lubricate themselves.
i wasnt awear of any oil issues.. seeing as oil and fuel should be seperate 
engine will run alittle warmer. might also need to have an alloy head too.. not 100% sure
anything i'm missing guys????
i cant be stuffed changing it on my 4a-c. runs fine with unleaded and the valve saver fluid.
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Location:
Brisbane
Registered:
May 2002
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Re: changing from LRP to PULP...
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Tue, 31 May 2005 14:24
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Run it on unleaded and don't give it another thought. You don't have to change anything or do anything different.
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Location:
Hawthorn, Vic
Registered:
March 2005
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Re: changing from LRP to PULP...
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Tue, 31 May 2005 14:35
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you could also do that
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Registered:
May 2005
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Re: changing from LRP to PULP...
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Tue, 31 May 2005 14:46
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Yeah, I thought the same thing about the sump. How has the fuel system got anything to do with the oil?
This is the article I read: http://carpoint.ninemsn.com.au/portal/alias__carpo intau/tabID__6491/ArticleID__6456/DesktopDefault.a spx
And this is the part of the article I'm referring to:
"POST-LEADED TRAUMAS
Here's a guide to what leaded car owners should expect after weaning their vehicles off Super fuel.
· Most leaded cars over the years build up a layer of sediment and lead deposits throughout the fuel system and engine. The new premium unleaded fuels contain very aggressive cleaning packages designed to keep your engine clean inside.
In an old engine they can be too effective and dislodge the gunk that may be holding the engine together. Various fuel filters will clog and will need to be changed more often until the engine is clean inside.
Oil consumption may also increase as the full extent of the wear becomes apparent. It is advisable to monitor oil colour and change the oil and filter more regularly during any changeover to premium unleaded in an old engine, as the dislodged gunk will often end up in the sump."
matt
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Location:
Brisbane
Registered:
February 2003
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Re: changing from LRP to PULP...
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Tue, 31 May 2005 15:11
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what a crock... change fuel, change petrol filter as required (e.g. gets blocked up with shit) and change oil when needed (e.g. when turning black or 5000k which ever happens first).
if your engine is now 22 years old, i'd be more worried about the condition of the rings, bores, valve guides/seals/seats than what kind of fuel it'll burn.
search forum for other threads relating to LRP/unleaded fuel use
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Registered:
May 2005
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Re: changing from LRP to PULP...
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Tue, 31 May 2005 15:25
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Yeah, I'd already done a search and read quite a few posts about it. They pretty much all said just go for a high octane and it'll be all good but that article suggested to me that there was more to the story, that's why I asked.
thanks
matt
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