No. Premium processing shortens the decision clock but does not improve a weak file. Pay the Form I-129 fee and surcharges in the USCIS fee schedule once the product documentation and placement arrangement are complete; add premium processing only if the schedule requires it.
Spend on the deciding documents before spending on speed
The government charges for an L-1B petition are fixed by the USCIS fee schedule (G-1055): the Form I-129 fee, the fraud prevention and detection fee and any surcharge that applies to the petitioner, with premium processing as an optional addition. None of these are refunded if the petition is denied because the knowledge was described as general skill or because the dealer placement looked like labour for hire. The money that changes the outcome is spent earlier: on gathering and translating the internal manuals and warranty records, on drafting the dealer-support arrangement so the subsidiary retains control, and on a technical statement that cites the records.
Once those exist, decide whether the season or the dealers' needs justify premium processing. Advisory fees are private costs and should appear separately from government fees in any budget shared with the specialist.