What weight oil in a 2006 Lotus Elise with the ForcedFed turbo?

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Apr 27, 2010
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Suburban Washington DC
The car uses the engine from the early 2000's Toyota Celica, a 2ZZ-GE. The manual says 5W40. Would that be good with the aftermarket turbo system? Would 5W50 be a better choice? It only has 25,000 miles.
 
The 5W40 should be fine, the bigger thing to worry about on a 2ZZ that you're putting a turbo on is what fuel you're putting in it to keep it from knocking.
 
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