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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: 2T-GEU Oil & Other Questions
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Tue, 18 November 2003 10:57
 
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| ta23 wrote on Tue, 18 November 2003 21:46 |
Reason being is that these motors were made when synthetic oil wasnt around therefore they were made for the use of regular thicker oils.
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well, i reckon since my car was designed for 20w-50 (ie 50 weight oil when hot) using a synthetic with 5W-50 means that at operating temp, the oil is same thickness, btu when cold the oil is same thickness, so there is less of a 'warm up period' when the oil is thick and sluggish and doesn't get to all corners of the motor (like rockers etc)
i have usd all manner of oils in my 4K, from 5W30 to 25w60 looking for what works best for me... i've settled on the 5W50 mobil 1 cos:
1) no warm up time for oil... warm is how long it takes the intake manifold to warm up.
2) oil burns much less. much longer between changes.
3) sounds much happier at 8000rpm.
but thats just me. i wouldn't go anything less than a 50wt for an older motor as the oil does get too thin at high temps. but saying a 50weight synthetic is thinner than a 50weight mineral doesn't make sense 
Cya, Stewart
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