IT could have been at least ten if the Mariners' finishing had been better – but either way their second friendly saw a much-improved display.
As expected, new signing Alex Rodman came in for his Town debut. And he was joined in the starting line-up by a trialist keeper, Jake Turner, and Youth team right-back Paul Walker.
After looking understandably rusty in their opening friendly against Cleethorpes Town on Tuesday, this time the Mariners raced out of the blocks.
Three goals and a string of goalscoring opportunities followed in a first-half completely controlled by the visiting professionals, whose formation was best described as 4-2-1-3.
After Shaun Pearson had nodded a corner wide in the 15th minute, Town were in front just a minute later.
Dayle Southwell's pass put Liam Hearn away through the inside right channel and his centre was deflected into the air slightly behind Lenell John-Lewis.
The forward reorganised his feet superbly, however, and thundered a stunning overhead bicycle kick past home keeper Craig Turner and into the top corner.
The Mariners were completely controlling possession and saw two gilt-edged chances go begging before they doubled their lead in the 28th minute.
Southwell headed over from six yards after good work by trialist defender Chris Doig, before Hearn bent a shot wide from just inside the Winterton box.
In Pictures: Winterton Rangers 0 Grimsby Town 5
Hearn didn't have to wait long for his goal, though, exchanging passes with Southwell before side-footing home.
Craig Turner continued to be Rangers' stand-out player, saving from Hearn, Southwell and Rodman before he was beaten for a third time.
Scott Kerr fed Hearn on the left wing and his pull-back was perfect for Southwell to tap home in the 33rd minute.
Hearn turned his marker inside-out and forced another reflex stop from the home keeper before Rodman's follow-up was also pushed away.
Town's domination continued right up to the break as Rodman rolled a shot wide of the post and Pearson planted another header wide.
Rob Scott and Paul Hurst made seven changes at the break, with young gun Walker replaced after an impressive start to life in senior football.
Trialist keeper Jake Turner hadn't touched the ball all half before making way for James McKeown.
It took eight minutes for the Mariners to make it four, as a Rangers defender poke a low cross into his own net.
Andy Cook blazed over as the one-way traffic continued, although the hosts did finally have a dribbler on target shortly before the hour mark.
Rangers boss Leigh Herrick rang the changes, with a raft of substitutions, seconds after Cook had headed a presentable chance over the bar.
Walker returned in place of Kerr as Hatton moved into midfield, before it became the Cook v Craig Turner show.
On three separate occasions, the home keeper denied Town's striker with stunning saves.
The stopper eventually left the field to a standing ovation, but the onslaught continued with the impressive Joe Colbeck and Hatton firing wide twice apiece.
Ross Hannah uncharacteristically blazed over in the final ten minutes, but Town did finally grab their fifth three minutes from time as Colbeck cut in from the left and hammered a stunning strike off the foot of the far post and in.
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