1998 Buick Skylark Owner's Manual - Page 239
1998 Buick Skylark Manual
Page 239 highlights
RECOMMENDEDSAEUISCOSITYGRADE ERIGINE OILS -' HOT WEATHER 7 "C t 38 t 21 t 16 t4 -7 -18 GM Goodwrench@oil meets all the requirements€or your vehicle. 1 2 I IER DO NOT USE S E 2OW-50 OR ANY OTHER h GRADE OIL NOT RECOMMENDED
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