What are the recommended spark plugs for this model Toyota,Celsior,1991(LS400) UCF11

1991 LEXUS LS 400
156,780 MILES
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EDYLYIMO
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My mechanic says this car has special requirements in spark plugs and i dont know the types
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Sep 15, 2012 at 5:24 PM
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SATURNTECH9
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I see oringal equipment is just platnuim nothing really that fancy.
Sep 15, 2012 at 5:35 PM
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KHLOW2008
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Nippondenso - PK20R-11.

Equivalent
Bosch - FR5SP1X gapped at 1.1 mm
Champion - RC8PYP gapped at 0.8 mm
NGK - BKR6EP-11
Sep 15, 2012 at 5:38 PM