diff --git a/applications/ebos/eclequilinitializer.hh b/applications/ebos/eclequilinitializer.hh
index e3dfd288e..ebdb67d89 100644
--- a/applications/ebos/eclequilinitializer.hh
+++ b/applications/ebos/eclequilinitializer.hh
@@ -76,7 +76,7 @@ public:
         : simulator_(simulator)
     {
         const auto& gridManager = simulator.gridManager();
-        const auto& grid = gridManager.grid();
+        const auto& equilGrid   = gridManager.equilGrid();
 
         // create the data structures which are used by initStateEquil()
         Opm::parameter::ParameterGroup tmpParam;
@@ -84,19 +84,21 @@ public:
             gridManager.deck(),
             gridManager.eclState(),
             materialLawManager,
-            Opm::UgGridHelpers::numCells(grid),
-            Opm::UgGridHelpers::globalCell(grid),
-            Opm::UgGridHelpers::cartDims(grid),
+            Opm::UgGridHelpers::numCells(equilGrid),
+            Opm::UgGridHelpers::globalCell(equilGrid),
+            Opm::UgGridHelpers::cartDims(equilGrid),
             tmpParam);
 
+        const int numElems = equilGrid.size(/*codim=*/0);
+        assert( int(gridManager.grid().size(/*codim=*/0)) == numElems );
         // initialize the boiler plate of opm-core the state structure.
         Opm::BlackoilState opmBlackoilState;
-        opmBlackoilState.init(grid.size(/*codim=*/0),
+        opmBlackoilState.init(numElems,
                               /*numFaces=*/0, // we don't care here
                               numPhases);
 
         // do the actual computation.
-        Opm::initStateEquil(gridManager.grid(),
+        Opm::initStateEquil(equilGrid,
                             opmBlackoilProps,
                             gridManager.deck(),
                             gridManager.eclState(),
@@ -109,7 +111,6 @@ public:
         const Scalar MO = FluidSystem::molarMass(oilCompIdx);
 
         // copy the result into the array of initial fluid states
-        int numElems = gridManager.gridView().size(/*codim=*/0);
         initialFluidStates_.resize(numElems);
         for (int elemIdx = 0; elemIdx < numElems; ++elemIdx) {
             auto &fluidState = initialFluidStates_[elemIdx];
diff --git a/applications/ebos/eclproblem.hh b/applications/ebos/eclproblem.hh
index 5af369ec5..01966c47e 100644
--- a/applications/ebos/eclproblem.hh
+++ b/applications/ebos/eclproblem.hh
@@ -41,6 +41,7 @@
 
 #include <ewoms/models/blackoil/blackoilmodel.hh>
 #include <ewoms/disc/ecfv/ecfvdiscretization.hh>
+#include <ewoms/io/polyhedralgridconverter.hh>
 
 #include <opm/material/fluidmatrixinteractions/EclMaterialLawManager.hpp>
 #include <opm/material/fluidstates/CompositionalFluidState.hpp>
@@ -849,9 +850,6 @@ private:
 
     void readEquilInitialCondition_()
     {
-#if EBOS_USE_ALUGRID
-#warning "EQUIL-based initialization cannot yet be used with ALUGrid"
-#else
         // The EQUIL initializer also modifies the material law manager according to
         // SWATINIT (although it does not belong there strictly speaking)
         typedef Ewoms::EclEquilInitializer<TypeTag> EquilInitializer;
@@ -868,7 +866,9 @@ private:
             auto &elemFluidState = initialFluidStates_[elemIdx];
             elemFluidState.assign(equilInitializer.initialFluidState(elemIdx));
         }
-#endif
+
+        // release the equil grid pointer since it's no longer needed.
+        this->simulator().gridManager().releaseEquilGrid();
     }
 
     void readExplicitInitialCondition_()
diff --git a/ewoms/common/cartesianindexmapper.hh b/ewoms/common/cartesianindexmapper.hh
index d0b108b8b..1494b429a 100644
--- a/ewoms/common/cartesianindexmapper.hh
+++ b/ewoms/common/cartesianindexmapper.hh
@@ -1,3 +1,23 @@
+// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+// vi: set et ts=4 sw=4 sts=4:
+/*
+  Copyright 2015 IRIS AS
+
+  This file is part of the Open Porous Media project (OPM).
+
+  OPM is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  OPM is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with OPM.  If not, see <http://www.gnu.org/licenses/>.
+*/
 #ifndef OPM_CARTESIANINDEXMAPPER_HEADER
 #define OPM_CARTESIANINDEXMAPPER_HEADER