1994 Honda oil grade change

I have a 1994 Honda 152k the dealer said use the same oil I use 10yrs ago.

1. Should I use a thicker oil.

No. The proper oil you used during this time is what allowed the engine to reach 152K. Using a thicker oil just causes the engine to wear out faster.

Tester

I will only add one thing to Tester’s comments. If you are putting lots of oil between changes, switch to a high mileage oil. It will not fix anything, but it will give you some more miles before the rebuild is needed.