hartzpad
Getting the Wheeling Fever
Reged: 03/21/06
Posts: 38
Loc: Utah
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My '96 T100 3.4L shows low oil pressure when fully warm and idling at a stoplight. If i give it any gas at all, even just a few hundred RPM's, the pressure goes up to almost to halfway. I only get low oil pressure when the truck has been run a lot and it is more prevalent in the hot summer days than the cold winter days. The engine is all original with only 129,000 miles on it.
The oil pressure never completely drops off the gauge, but it hovers on the lowest reading sometimes until I get the engine moving again.
These trucks take 5W-30 oil correct? Can I try using some 10W-40 to see if that increases the oil pressure slightly? Any other suggestions?
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Jake97T
Body Damage is Cool
Reged: 02/02/05
Posts: 1489
Loc: Seattle
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10w30 wont change it at operating temp, its normal for the oil pressure to be low at idle.
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97 FZJ80, Stock, Factory Lockers.
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wsquaredodie
Rock Warrior
Reged: 04/04/06
Posts: 649
Loc: Honeoye NY
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after 2 3.0's, one with 122k and the other at 155k, both did/do the same thing as yours. I am in upstate NY and use 20/50. If you are really concerned get an accurate guage and check it out...
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trafdlo
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95T100
Mudrunner
Reged: 11/14/01
Posts: 286
Loc: Fredericksburg, Va
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Check your manual, pretty sure that is with the norm. The 2nd and 4th line are where it should be when not at idle (if memory serves correct).
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1995 Toyota T100, Rhino Liner, SwayAway Torsion Bars, Bilestien Shocks, Brembo Rotors, Akebono Pads, SS Brakelines, Monroe Steering Stabilizer & TRD/Eaton LSD
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hartzpad
Getting the Wheeling Fever
Reged: 03/21/06
Posts: 38
Loc: Utah
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So there is no need to worry about the engine running out of oil pressure? It sometimes reads right at the very lowest possible on the oil pressure gauge. I didn't know if that meant there was 0 psi or if it is just enough to lubricate while idling?
I find myself bringing the engine up to about a 1000-1100 RPM idle just to bring it up and make myself feel better. I don't need to do that?
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adam
Body Damage is Cool
Reged: 07/07/00
Posts: 2125
Loc: 61°04'17.80"N 149°44'01.89"W
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Mine hasn't read like I intuit it 'should' since it broke in. It's entirely common for the dash gauge to read low. I wonder if it might start reading lower in relation to the valve cover gasket fading (or something else; it's a vehicle - things get old and wear out) as it seems mine has read a little lower since I noticed oil weeping out a little at the back end of the covers, but it should not be taken on its own as an indicator of a catastrophic engine failure. I would not (don't myself anyhow) feel a need to keep the engine raced a little at a stop the way you describe.
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~Adam
96 T100: D44, lockers and stuff
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foxtrapper
Body Damage is Cool
Reged: 07/18/03
Posts: 1262
Loc: Westminster, MD
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Unnerving, isn't it? Yet it's a Toyota truck special, they all do that. Low reading oil pressure gauges is the norm with Toyota trucks.
I did run 10w-40 in mine once, made a faint difference, but not much.
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'97 T-100 SR5
'86 Toyota's, the variety pack (all gone)
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Honger
Rock Warrior
Reged: 04/28/02
Posts: 664
Loc: Indianapolis, Indiana
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This is normal.
When I bought my first T100, it had the same behavior and only 62K miles. I made the replace the sender and gauge before purchasing. It did the exact same thing when new sender and gauge.
Joel
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1998 Toyota T100 SR5 ExtraCab 4WD
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hartzpad
Getting the Wheeling Fever
Reged: 03/21/06
Posts: 38
Loc: Utah
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Good to know, thanks to all of you for putting my fears to rest. I'll ignore it.
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